Sources of ancient Tamil history
There are literary, archaeological, epigraphic and numismatic sources of ancient Tamil history. The foremost among these sources is the Sangam literature, generally dated to 5th century BCE to 3rd century CE. The poems in Sangam literature contain vivid descriptions of the different aspects of life and society in Tamilakam during this age; scholars agree that, for the most part, these are reliable accounts. Greek and Roman literature, around the dawn of the Christian era, give details of the maritime trade between Tamilakam and the Roman empire, including the names and locations of many ports on both coasts of the Tamil country. There are evidences as could be seen comparing standard forms of Sumerian literature and those recovered through present form of Tamil, for example the word for father in Sumerian transliteration is given as, "a-ia" that could easily be compared with Tamil word, "ayya". This also places ancient form of Tamil to early Sumerian period, say as ancient as 3500 BC. Archaeological excavations of several sites in Tamil Nadu and Kerala have yielded remnants from the Sangam era, such as different kinds of pottery, pottery with inscriptions, imported ceramic ware, industrial objects, brick structures and spinning whorls. Techniques such as stratigraphy and paleography have helped establish the date of these items to the Sangam era. The excavated artifacts have provided evidence for existence of different economic activities mentioned in Sangam literature such as agriculture, weaving, smithy, gem cutting, building construction, pearl fishing and painting. Inscriptions found on caves and pottery are another source for studying the history of Tamilakam. Writings in Tamil-Brahmi script have been found in many locations in Kerala, Tamil Nadu, Sri Lanka and also in Egypt and Thailand. mostly recording grants made by the kings and chieftains. References are also made to other aspects of the Sangam society. Coins issued by the Tamil kings of this age have been recovered from river beds and urban centers of their kingdoms. Most of the coins carry the emblem of the corresponding dynasty on their reverse, such as the bow and arrow of the Cheras; some of them contain portraits and written legends helping numismatists assign them to a certain period. Literary sources in Tamil 

By far, the most important source of ancient Tamil history is the corpus of Tamil poems, referred to as Sangam literature, generally dated from the last centuries of the pre-Christian era to the early centuries of the Christian era. It consists of 2,381 known poems, with a total of over 50,000 lines, written by 473 poets. Each poem belongs to one of two types: Akam (inside) and Puram (outside). The akam poems deal with inner human emotions such as love and the puram poems deal with outer experiences such as society, culture and warfare. They contain descriptions of various aspects of life in the ancient Tamil country. The Maduraikkanci by Mankudi Maruthanaar contains a full-length description of Madurai and the Pandyan country under the rule of Nedunj Cheliyan III. The Netunalvatai by Nakkirar contains a description of the king’s palace. The Purananuru and Akanaṉūṟu collections contain poems sung in praise of various kings and also poems that were composed by the kings themselves. The Sangam age anthology Pathirruppaththu provides the genealogy of two collateral lines for three or four generations of the Cheras, along with describing the Chera country, in general. The poems in Ainkurnuru, written by numerous authors, were compiled by Kudalur Kizhar at the instance of Chera King Yanaikkatcey Mantaran Ceral Irumporai.The Chera kings are also mentioned in other works such as Akanaṉūṟu, Kuruntokai, Natṟiṇai and Purananuru. The Pattinappaalai describes the Chola port city of Kaveripumpattinam in great detail. It mentions Eelattu-unavu – food from Eelam – arriving at the port. One of the prominent Sangam Tamil poets is known as Eelattu Poothanthevanar meaning Poothan-thevan (proper name) hailing from Eelam mentioned in Akanaṉūṟu: 88, 231, 307; Kurunthokai: 189, 360, 343 and Naṟṟiṇai: 88, 366. The historical value of the Sangam poems has been critically analysed by scholars in the 19th and 20th centuries. Sivaraja Pillay, a 20th-century historian, while constructing the genealogy of ancient Tamil kings from Sangam literature, insists that the Sangam poems show no similarities with ancient Puranic literature and medieval Tamil literature, both of which contain, according to him, fanciful myths and impossible legends. He feels that the Sangam literature is, for the most part, a plain unvarnished tale of the happenings of a by-gone age. Scholars like Dr. Venkata Subramanian, Dr. N. Subrahmanian, Dr. Sundararajan and J.K. Pillay concur with this view. Noted historian K.A.N. Sastri dates the presently available Sangam corpus to the early centuries of the Christian Era. He asserts that the picture drawn by the poets is in obedience to literary tradition and must have been based on solid foundation in the facts of contemporary life; he proceeds to use the Sangam literature to describe the government, culture and society of the early Pandyan kingdom. Kanakalatha Mukund, while describing the mercantile history of Tamilakam, points out that the heroic poetry in Sangam literature often described an ideal world rather than reality, but the basic facts are reliable and an important source of Tamil history. Her reasoning is that they have been supported by archaeological and numismatic evidence and the fact that similar vivid descriptions are found in works by different poets. Dr. Husaini relies on Sangam literature to describe the early Pandyan society and justifies his source by saying that some of the poetical works contain really trustworthy accounts of early Pandyan kings and present facts as they occurred, though they never throw much light about the chronology of their rule. Among the critics of using Sangam literature for historical studies is Herman Tieken, who maintains that the Sangam poems were composed in the 8th or 9th century and that they attempt to describe a period much earlier than when they were written. Tieken's methodology of dating Sangam works has been criticized by Hart, Ferro-Luzzi, and Monius. Robert Caldwell, a 19th-century linguist, dates the Sangam works to a period that he calls the Jaina cycle which was not earlier than the 8th century; he does not offer an opinion on the historical value of the poems. Kamil Zvelebil, a Czech indologist, considers this date quite impossible and says that Caldwell's choice of works are whimsical. Champakalakshmi states that since the Sangam period is often stretched from 300 BCE to 300 CE and beyond, it would be hazardous to use the Sangam works as a single corpus of source for the entire period. According to Encyclopædia Britannica, the Sangam poems were created between the 1st century BCE and 4th century CE and many of them are free from literary conceits. The Macropaedia mentions that the historical authenticity of sections of Sangam literature has been confirmed by archaeological evidence. Literary sources in other languages 

Kautilya (c. 370–283 BCE), in his Sanskrit work Arthashastra, mentions the "easy to travel" trade route to the South and the products of the Pandya kingdom, including some special varieties of pearls. He refers to the city of Madurai and the river Tamaraparani in the Pandya kingdom. The Sinhalese chronicle Mahawamsa claims that King Vijaya (c. 543 BCE) married a daughter of the Pandyan king Kulasekaran, to whom he was sending rich presents every year. Using the references to king Gajabahu I in the Mahawamsa and the Uraiperu katturai of the Tamil epic Cilappatikaram, historians have arrived at a literary chronological device referred to as the Gajabahu synchronism to date the events mentioned in the Tamil epic to the 2nd century CE. The famous Greek traveler Megasthenes (c. 302 BCE) mentions the "Pandae" kingdom and refers to it as "that portion of India which lies to the southward and extends to the sea". The Roman historian Strabo (c. 1st century BCE) mentions the embassies sent by the Pandyas to the court of Augustus, along with a description of the ambassadors from Dramira. He also gives various details about the trading relationship between the Tamil kingdoms and Rome. Pliny the Elder (c. 77 CE) refers to many Tamil ports in his work The Natural History. The Periplus of the Erythraean Sea (c. 60–100 CE) gives an elaborate description of the Tamil country and describes the riches of a 'Pandian Kingdom':
""Then come Naura and Tyndis, the first markets of Damirica (Limyrike), and then Muziris and Nelcynda, which are now of leading importance. Tyndisis of the Kingdom of Cerobothra; it is a village in plain sight by the sea. Muziris, of the same Kingdom, abounds in ships sent there with cargoes from Ariake, and by the Greeks; it is located on a river, distant from Tyndis by river and sea five hundred stadia, and up the river from the shore twenty stadia...Nelcynda is distant from Muziris by river and sea about five hundred stadia, and is of another Kingdom, the Pandian. This place also is situated on a river, about one hundred and twenty stadia from the sea...."

One such port, Kudiramalai is mentioned in Greek as Hippuros, a famous port of the Malabar country in Ceylon to the ancient Greeks. Pliny states that in the reign of the Emperor Claudius in 47 CE:
"Annius Plocamus, a freedman, having farmed the customs of the Red Sea, was, while sailing along the coast of Arabia over fifteen days, driven by contrary winds into Hippuros, a port of Taprobane, where he was entertained with kindly hospitality by the king. In six months' time he acquired a thorough knowledge of the Tamil language." An embassy of four envoys were sent from the island to Rome, including ambassador-in-chief Rasaiah from the King of Kudiramalai. To the Romans, the Kudiramalai envoys related particulars about their kingdom's inhabitants, including their common life expectancy of 100 years, their government, a council of thirty persons, free civil liberties and laws pertaining to abuse of sovereign power, their trade with the Seres (Chera), their festivals surrounding "the chase", and their delights in the elephant and the tiger. The ambassadors felt their kingdom to be richer than Rome's, although in their eyes Rome put its wealth to much better use. The Peutingerian tables which speak of a temple of Augustus in the west coast of Tamilakam were composed in 222 CE. The Roman emperor Julian received an embassy from a Pandya about 361. A Roman trading centre was located on the Pandyan coast (Alagankulam—at the mouth of the Vaigai river, southeast of Madurai). The Pandyas also had trade contacts with Ptolemaic Egypt and, through Egypt, with Rome by the 1st century, and with China by the 3rd century. The 1st century Greek historian Nicolaus of Damascus met, at Damascus, the ambassador sent by an Indian King "named Pandion or, according to others, Porus" to Caesar Augustus around 13 CE (Strabo XV.1–4, and Strabo XV.1–73). The Buddhist Jataka story known as Akiti Jataka refers to the Damila-rattha (Tamil country) including the region of Kaveripattinam. In the Petavatthu commentary, the Damila country encompasses the Dakhinapátha. The Chinese writer Pan Kou, who lived before the 1st century CE, refers to the city of Kanchipuram in his work Tsien han chou. The Chinese historian Yu Huan in his 3rd century text, the Weilüe, mentions The Kingdom of Panyue:
"...The kingdom of Panyue is also called Hanyuewang. It is several thousand li to the southeast of Tianzhu (Northern India)...The inhabitants are small; they are the same height as the Chinese..."

Archeological sources 

According to Abraham, the Sangam era corresponds roughly to the period 300 BCE–300 CE, based on archaeology. Many historical sites have been excavated in Tamil Nadu and Kerala, many of them in the second half of the 20th century. One of the most important archaeological sites in Tamil Nadu is Arikamedu, located  south of Pondicherry. According to Wheeler, it was an Indo-Roman trading station that flourished during the first two centuries CE. It has been suggested that Arikamedu was first established as a settlement c. 250 BCE and lasted until 200 CE. Kodumanal and Perur, villages on the banks of the Noyyal river in Coimbatore district, were situated on the ancient trade route between Karur and the west coast, across the Palghat gap on the Western Ghats. Both sites have yielded remains belonging to the Sangam age. Kaveripumpattinam, also known as Puhar or Poompuhar, is located near the Kaveri delta and played a vital role in the brisk maritime history of ancient Tamilakam. Excavations have been carried out both on-shore and off-shore at Puhar and the findings have brought to light the historicity of the region. The artefacts excavated date between 300 BCE and early centuries CE. Some of the off-shore findings indicate that parts of the ancient city may have submerged under the advancing sea or tsunami, as alluded to by the Sangam literature. Korkai, a port of the early Pandyas at the Tamraparani basin, is now located 7 km inland due to the retreating shoreline caused by sediment deposition. Alagankulam, near the Vaigai delta, was another port city of the Pandyas and an archaeological site that has been excavated in the recent years. Both the Pandyan ports have provided clues about local occupations, such as pearl fishing. Other sites that have yielded remnants from the Sangam age include Kanchipuram, Kunnattur, Malayampattu and Vasavasamudram along the Palar river; Sengamedu and Karaikadu along the Pennar river; Perur, Tirukkampuliyur, Alagarai and Urayur along the Kaveri river. These excavations have yielded different varieties of ceramics such as black and red ware, rouletted ware and Russet coated ware, both locally made and imported kinds. Many of the pottery sherds contain Tamil-Brahmi inscriptions on them, which have provided additional evidence for the archaeologist to date them. Other artifacts such as brick walls, ring wells, pits, industrial items, remains of seeds and shells provide clues about the nature of the settlements and the other aspects of life during the Sangam age. Archaeologists agree that activities best illustrated in the material records of Tamilakam are trade, hunting, agriculture and crafts. Evidence for economic activities 

Archeological evidence for agriculture in the Sangam age has been retrieved from sites such as Mangudi, Kodumanal and Perur, which have yielded charred remains of seeds of crops like rice, millets including pearl millets, pulses and cotton. It has been deduced that agriculture most likely involved dry farming, with additional irrigation for cotton and rice; mixed cropping seems to have been undertaken to replenish the nitrogen in the soil—this also suggests a spread of labour and knowledge of different sowing and harvesting techniques. The presence of cotton seeds indicates the production of a crop aimed at craft production, which is also attested by finds of cotton and spindle whorls at Kodumanal. Remains of structures that resemble an artificial water reservoir have been located at different sites. In Arikamedu, a few terracotta ring-wells were found at the bottom of the reservoir; it has been suggested that the ring wells were to assure the supply of water during the dry season. A research survey at Kodumanal has unearthed the remains of an ancient blast furnace, its circular base distinguishable by its white colour, probably the result of high temperature. Around the base, many iron slags, some with embedded burnt clay, vitrified brick-bats, many terracotta pipes with vitrified mouths and a granite slab, which may have been the anvil, have been recovered. Absence of potsherds and other antiquities has suggested that the smelting place was located outside the boundary of habitation. More furnaces were discovered at the same site with burnt clay pieces with rectangular holes. The pieces were part of the furnace wall, the holes designed to allow a natural draught of air to pass through evenly into the furnace. Many vitrified crucibles were also recovered from this site; one of them notable because it was found in an in situ position. Evidence of steel making is also found in the crucibles excavated at this site. In addition to iron and steel, the metallurgy seems to have possibly extended to copper, bronze, lead, silver and gold objects. At Arikamedu, there were indications of small-scale workshops containing the remains of working in metal, glass, semiprecious stones, ivory and shell. Kodumanal has yielded evidence for the practice of weaving, in the form of a number of intact terracotta spindle whorls pierced at the centre by means of an iron rod, indicating the knowledge of cotton spinning and weaving. To further strengthen this theory, a well preserved piece of woven cotton cloth was also recovered from this site. Dyeing vats were spotted at Arikamedu. Many brick structures have been located at Kaveripumpattinam during on-shore, near shore and off-shore explorations; these provide proof for building construction during Sangam age. The on-shore structure include an I-shaped wharf and a structure that looks like a reservoir. The wharf has a number of wooden poles planted in its structure to enable anchorage of boats and to facilitate the handling of cargo. Among other structures, there is a Buddhist vihara with parts of it decorated using moulded bricks and stucco. Near shore excavations yielded a brick structure and a few terracotta ring wells. Off-shore explorations located a fifteen course brick structure, three courses of dressed stone blocks, brick bats and pottery. At Arikamedu, there were indications of a structure built substantially of timber, possibly a wharf. Conical jars that could have been used for storing wine and oil have been found near structures that could have been shops or storage areas. Evidence of continued building activity are present at this site, with the most distinctive structures being those of a possible warehouse, dyeing tanks and lined pits. Kodumanal was popular for the gem-cutting industry and manufacture of jewels. Sites bearing natural reserves of semi-precious stones such as beryls, sapphire and quartz are located in the vicinity of Kodumanal. Beads of sapphire, beryl, agate, carnelian, amethyst, lapis lazulli, jasper, garnet, soapstone and quartz were unearthed from here. The samples were in different manufacturing stages – finished, semi-finished, drilled and undrilled, polished and unpolished and in the form of raw material. Chips and stone slabs, one with a few grooved beads, clearly demonstrate that these were manufactured locally at Kodumanal. Excavations at Korkai have yielded a large number of pearl oyesters at different levels, indicating the practice of the trade in this region. Some of the objects excavated from Kodumanal show a lot of artistic features such as paintings on the pottery, engravings on the beads, hexagonal designs on beads, inlay work in a tiger figurine and engraved shell bangles. More than ten designs are noticed in the paintings and bead etchings. There are remnants of many of the items imported from and exported to the Roman empire, at Arikamedu. Imported items recovered from here include ceramics such as amphorae and sherds of Arretine ware, glass bowls, Roman lamps, a crystal gem and an object resembling a stylus. Artifacts that may have been meant for export include jewellery, worked ivory, textiles and perhaps leather or leather-related products. Similar looking ornaments have been recovered from Arikamedu and Palatine Hill in Rome, further confirming that this site was a leading trade center. The Pandyan port city Alagankulam has yielded a rouletted pottery ware that bears the figure of a ship on the shoulder portion. This figure is very similar to a finding reported from Ostia, an ancient port of the Romans. Wharf-like structures found at many port cities indicate that they might have been used as docks. Based on marine explorations of various port-sites, it has been suggested that stone anchors may have been used since as early as the 3rd century BCE. Epigraphical sources 

During the later half of the 20th century, several inscriptions of the Sangam age have been discovered in Tamil Nadu and Kerala. Most of them are written in Tamil-Brahmi script and are found in rocks or on pottery. The information obtained from such inscriptions have been used to corroborate some of the details provided by the Sangam literature. Cave inscriptions 
The 2nd and 13th rock edicts of Ashoka (273–232 BCE) refers to the Pandyas, Cholas, Cheras and the Satiyaputras. According to the edicts, these kingdoms lay outside the southern boundary of the Mauryan Empire. The Hathigumpha inscription of the Kalinga King, Kharavela, (c. 150 BCE) refers to the arrival of a tribute of jewels and elephants from the Pandyan king. It also talks about a league of Tamil kingdoms that had been in existence 113 years before then. The earliest epigraphic records of the Tamil country in Tamil Nadu were found in Mangulam village near Madurai. The cave inscriptions, deciphered in 1966, have been dated to the 2nd century BC and record the gift of a monastery by Pandyan king Nedunj Cheliyan to a Jain monk. These inscriptions are also the oldest Jain inscriptions in South India and among the oldest in all of India. References to Sangam age Chera dynasty are found in Tamil-Brahmi inscriptions of 3rd century CE found on rocks in Edakal hill in Wynad district of Kerala. The ancient port city of Thondi is mentioned in inscriptions found in Kilavalavu village near Madurai. The early part of the 20th century saw the discovery of about 39 inscriptions in a dozen locations, all near Madurai. The most significant of these were the ones at Alagarmalai and Sittannavasal. The Alagarmalai inscriptions, dated to the 1st century BCE, record the endowments made by a group of merchants from Madurai. Another set of inscriptions from the 2nd century CE, found at Pugalur village near Karur, document the construction of a rock shelter by a Chera king of the Irumporai line for a Jain monk, Cenkayapan. Cave inscriptions at Arachalur, dated to the 4th century, provide evidence for the cultivation of music and dance in the Tamil country. One of the earliest inscriptional evidence of the chieftains of the Sangam age was found at Jambai, a village near the town of Tirukkoyilur in Villupuram district of Tamil Nadu. These inscriptions belonging to the 1st century CE record the grants made by the chieftain Atiyaman Netuman Anci who ruled from Takatur. According to epigraphist I. Mahadevan, there were some reservations initially, about the linguistic details in the inscriptions, but further investigations have confirmed their authenticity. Inscriptions from the 2nd century CE found at Mannarkoil village in Tirunelveli district contain a reference to a katikai, which could mean an assembly of learned persons or an institution of higher learning. An inscription belonging to the early Cholas has been discovered near Tiruchirappalli and has been dated between the 2nd and 4th century. An analysis of the geographical sites of these cave inscriptions points to the possibility of the Tamil-Brahmi script having been created at Madurai around the 3rd century BCE and its disseminations to other parts of Tamil country thereafter. Pottery inscriptions 

Inscriptions on pottery, written in Tamil-Brahmi, have been found from about 20 archaeological sites in Tamil Nadu. Using methods such as stratigraphy and palaeography, these have been dated between the 2nd century BCE and 3rd century CE. Also found in present-day Andhra Pradesh and Sri Lanka, similar inscriptions in Tamil-Brahmi have been found outside the ancient Tamil country in Thailand and the Red Sea coast in Egypt. Arikamedu, the ancient port city of the Cholas, and Urayur and Puhar, their early capitals, have yielded several fragmentary pottery inscriptions, all dated to the Sangam age. Kodumanal, a major industrial center known for the manufacture of gems during this period, had remains of pottery with inscriptions in Tamil, Prakrit and Sinhala-Prakrit. Alagankulam, a thriving sea port of the early Pandyas, has yielded pottery inscriptions that mention several personal names including the name of a Chera prince. One of the pottery sherds contained the depiction of a large Roman ship. Many other ancient sites such as Kanchipuram, Karur, Korkai and Puhar have all yielded pottery with inscriptions on them. Outside of Tamil Nadu and Kerala, inscriptions in Tamil-Brahmi have been found in Srikakulam district in Andhra Pradesh, Jaffna in modern Sri Lanka, ancient Roman ports of Qusier al-Qadim and Berenike in Egypt. The 2nd century BCE potsherds found in excavations in Poonagari, Jaffna, bear Tamil inscriptions of a clan name – vēḷāṉ, related to velirs of the ancient Tamil country. The inscriptions at Berenike refer to a Tamil chieftain Korran. Other inscriptions 
The Thiruparankundram inscription found near Madurai in Tamil Nadu and dated on palaeographical grounds to the 1st century BCE, refers to a person as a householder from Eelam (Eela-kudumpikan). It reads: erukatur eelakutumpikan polalaiyan – "Polalaiyan, (resident of) Erukatur, the husbandman (householder) from Eelam. Apart from caverns and pottery, Tamil-Brahmi writings are also found in coins, seals and rings of the Sangam age. Many of them have been picked up from the Amaravathi river bed near Karur. A smaller number of inscribed objects have been picked up from the beds of other rivers like South Pennar and Vaigai. An oblong piece of polished stone with Tamil-Brahmi inscription has been located in a museum in the ancient port city of Khuan Luk Pat in southern Thailand. Based on the inscription, the object has been identified as a touchstone (uraikal) used for testing the fitness of gold. The inscription is dated to 3rd or 4th century. Polity from inscriptions 
Epigraphy provides an account of various aspects of Sangam polity and has been used to verify some of the information provided by sources such as literature and numismatics. The names of various kings and chieftains occurring in the inscriptions include Nedunj Cheliyan, Peruvaluthi, Cheras of the Irumporai family, Tittan, Nedunkilli, Adiyaman, Pittan and Korrantai. References to administration includes the chiefs, superintendents, titles of ministers, palace of merchants and the village assembly. Religious references to Buddhist and Jain monks are found frequently, which have provided valuable information explaining the spread of those religions in Tamilakam. Brief mentions of various aspects of the Sangam society such as agriculture, trade, commodities, occupations, the social stratification, flora, fauna, music and dance, names of cities and names of individuals are also found in the inscriptions. Numismatic sources 
Another important source of studying ancient Tamil history are the coins that have been found in recent years in the excavations, megaliths, hoards and surface. The coins belonging to the Sangam age, found in Tamil Nadu are generally classified into three categories. The first category consists of punch-marked coins from Magadha (400 BCE–187 BCE) and the Satavahanas (200 BCE–200 CE). The second category is made up of coins from the Roman Empire dated from 31 BCE to 217 CE, coins of Phoenicians and Seleucids and coins from the Mediterranean region (c. 300 BCE). The third category of Sangam age Tamil coins are the punch-marked silver, copper and lead coins dated 200 BCE–200 CE and assigned to the Sangam age Tamil kings. The coins belonging to the first two categories mostly attest to the trading relationships that the Tamil people had with the kingdoms of northern India and the outside world. But they do not offer much information regarding the Sangam age Tamil polity. The third category of coins, however, have provided direct testimony to the existence of ancient Tamil kingdoms and have been used to establish their period to coincide with that of the Sangam literature. Pandiya coin 
Among the many coins attributed to the early Pandyas, are a series of punch-marked coins made of silver and copper, that are considered to belong to the earliest period. Six groups of silver punch-marked coins and one group of copper coins have been analysed so far. All of these punch-marked coins have a stylised fish symbol on their reverse, which is considered the royal emblem of the Pandyas. On the obverse of these coins are a variety symbols such as the sun, the sadarachakra, the trishul, a dog, stupa etc. The first group of silver coins was found at Bodinayakanur, in a hoard containing 1124 coins all belonging to the same type. The remaining coins in the five silver group and the copper group were all found in the Vaigai river bed near Madurai. Four of the six silver groups have been assigned a date close to the end of the Mauryan rule, c. 187 BCE. Since Tamilakam was deficient in metallic silver and since Roman silver did not become available in abundance until later, around 44 BCE, it has been postulated that the Pandyan kings melted silver from the coins brought in by trade with Magadha or some foreign location other than Rome. The names of the Pandyan kings who issued this series of coins is not clear. Another series of coins, all made of copper and found near Madurai, have the fish symbol on the reverse and among other symbols on the obverse, have the legend Peruvaluthi written in the Tamil-Brahmi script. They have been assigned a date of around 200 BCE and are considered to have been issued by the Pandyan king Peruvaluthi. These coins are represent some of the few instances where the names of Sangam kings appear in non-literary sources. Sangam literature mentions the importance attached to Vedic sacrifices by Tamil kings including the Pandyan Mudukudumi Peruvaludhi. This fact is also corroborated by the discovery of several Pandyan coins that are referred to as the Vedic sacrifice series. These coins have symbols on their obverse that depict the sacrifices, such as a horse tied to the yuba-stambha, a yagna kunta and a nandhipada. More coins with animal symbols such as the tortoise, the elephant and the bull have been found and assigned to the Pandyan kings. Some of them even have a human portrait, possibly of the king who issued those coins, on their obverse. There are also Pandyan coins belonging to the 1st century BCE, that have symbols depicting pearls, signifying the importance of pearl fishery to the Pandyan kingdom. The excavations at Algankulam, near Madurai, recovered two copper coins of the early Pandyas along with Northern Black Polished Ware. These coins have been assigned a broad time period ranging from 200 BCE to 200 CE. Chera coins 
Many of the coins assigned to the Chera kings of Sangam age with a portrait and the legends "Makkotai" or "Kuttuvan Kotai" have been found near the Amaravathi River bed in Karur and elsewhere in Coimbatore district of Tamil Nadu state. They depict the royal emblem of the Cheras, the bow and arrow symbol, on the reverse. It was generally believed that the Satavahanas were the first indigenous monarchs to issue silver portrait coins. That has been disproved by the discovery of Makkotai and Kuttuvan Kotai coins belonging to the 1st century AD or a little later. Silver coins issued by Augustus and Tiberius have over a period of time been discovered in large numbers from the Coimbatore-Karur region. Among the Chera coins, the "Makkotai series" bears a unique pattern not found in other Tamil coins of its age. They contain both the portrait of a king (facing right) and a written legend, in this case the word "Makkotai" written in Tamil-Brahmi script. These coins exhibit similarities with the Roman coins of emperors Augustus and Tiberius; like the Roman coins, the portraits on the Makkotai series do not show any jewellery on the king. They are thought to be made of two separate pieces joined by lead, a practice prevalent elsewhere in India at that time. Official seals of the bearing the name "Makkotai" have also been recovered from the river bed; these seals contain the portrait facing left and the legend "Makkotai" written backwards (right-to-left). The reverse of the seals is blank. The Makkotai coins and the seals have been assigned a date range of 100 BC to end of 100 AD. Another aspect of the portraits on the Makkotai coins are that they do not have identical head sizes and some facial features also vary from one coin to another, even though they all have the same written legend. Such an observation has been made of coins assigned to the Western Kshatrapas of Gujarat, which are thought to be another inspiration for the Chera coins. Scholars who analyzed the varying portraiture on the Kshatrapa coins have advanced several theories to explain the phenomenon: that the coins could be of different kings who chose to keep the name of an ancestor on their coins or the coins all belong to one king with portraits depicting him at his different ages. Based on such theories, the Chera coins could either belong to a series of rulers or to a single king called Cheraman Makkotai. Another series of Chera coins depicts various animals along with symbols on its obverse and the Chera emblem on its reverse. Elephant, horse, bull, tortoise and lion are the animals depicted in this series, along with snake and fish. Symbols of inanimate objects include arched hills, battle axe, conch, river, swastika, trident, flowers and the sun. A few other coins that contain a portrait and a legend have been unearthed; a coin assigned to certain Kuttuvan Kotai with his portrait and the legend "Kuttuvan Kotai" is notable for the occurrence of the "pulli" in the legend. Based on paleography of the script, it has been assigned a date of the late 1st century to early 2nd century AD. A coin belonging to 100 AD with the legend "Kollipurai" and a full-body portrait of a warrior has been assigned to the king Kopperum Cheral Irumporai, as he was known as the victor of Kolli in literature. Another coin of roughly the same period of 100 AD with the legend "Kolirumporaiy" and a warrior portrait has been found; it has not been assigned to a single king, but based on the legend, there are at least six Chera kings who could be associated with it. A Chera coin with the portrait of a king wearing a Roman helmet was discovered from Karur. The obverse side of the silver coin has the portrait of a king, facing left, wearing a Roman-type bristled-crown helmet. This coin maybelong to the 1st century BC and may be earlier to Makkotai and Kuttuvan Kotai coins. With a flat nose and protruding lips, he has a wide and thick ear lobe but wears no ear-ring. The person depicted appears to be elderly. Unlike other Chera silver portrait coins, the king's portrait on this coin faces left. The coin points to Romans having had trade contacts with the Chera kings and establishes that the Roman soldiers had landed in the Chera country to give protection to the Roman traders who had come there to buy materials. Archaeological investigations conducted unearthed square or circular Chera coins made of copper from near Cochin. This was for the first time, from a stratographic context, coins of Sangam Chera period have been found in Kerala. The coin, which is almost a square in shape, has an elephant facing to the right and some symbols towards the top of the coin. The symbols could not be identified as the upper part of the coin was partially corroded. A drawn bow and arrow was visible on the other side. Below the arrow is an elephant goad (a prod used to control elephants). These coins bear a striking resemblance to the ones excavated from Karur in Tamil Nadu, said the archaeologists. Chola coins 

The number of Chola coins discovered so far are not as many as those of Pandyas; most of them have been found from archeological excavations at Puhar and Arikamedu, and also beds of rivers Amaravathi near Karur and South Pennar near Tirukkoilur. An early Chola coin has also been found in Thailand. The Chola coins do not contain a portrait or a legend and all of them depict symbols of animals and other inanimate objects like the animal series of the Cheras. But, all of them carry the symbol of a tiger, the Chola emblem, on their reverse. One of the coins has been assigned a date earlier than 200 BCE and some others to about the time of Roman influence, which is around the dawn of the Christian era. Coins of Chieftains 
Parts of the Sangam age Tamil country were ruled over by several independent chieftains, alongside the three crowned monarchs. Among them, coins belonging to the chieftains of the Malayaman clan have been found in Tamil Nadu. Many of them contain a written legend on the obverse and all of them have the image of a flowing river on their obverse. Based on the legends some of these coins have been assigned to specific rulers such as Tirukkannan, also known as Malaiyan Choliya Enadi Tirukkannan, and Tirumudi Kari. A series of coins without a legend but with a horse as the principal motif on the obverse have been assigned to the Malayaman chieftains, because of the river symbol on the obverse. Numismatist R. Krishnamurthy, dates these coins to the period between 100 BCE and 100 CE. Coin of Sri Lanka 
Excavations in the area of Tissamaharama in southern Sri Lanka have unearthed locally issued coins produced between the 2nd century BCE and the 2nd century CE, some of which carry Tamil personal names written in early Tamil characters, which suggest that Tamil merchants and Sri Lankan Tamils were present and actively involved in trade along the southern coast of Sri Lanka. Notes

References

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Tamil-language literature
Historiography of India
Ancient Tamil Nadu