when was this first ancient monument built?
Began in  AD 72 and was completed in AD 80.
Colosseum
Construction began under the emperor Vespasian in AD 72 and was completed in AD 80
who brought the third punic war to a successful conclusion Scipio Aemilianus when did this war begin and end? From 149 to 146 BC between which two civilizations this war was fought? Carthage and Rome what was the reason for this war? Scipio Africanus imposed a peace treaty on the Carthaginians which stripped them of their overseas territories, and some of their African ones. An indemnity of 10,000 silver talents was to be paid over 50 years. where is the civilization or the city latter mentioned located? Italy how can you describe its local government? It constitutes a comune "speciale", named "Roma Capitale", governed by a mayor and a city council. which pilgrimage site does the city has? Pilate's stairs, the "Scala Santa" and churches like San Luigi dei francesi and Santa Maria dell'Anima, to name a few. which is the common dialect spoken there? The Tuscan dialect and the Romanesco. can you mention some ancient monuments of this place? The Colosseum, the Roman Forum, the Domus Aurea etc.
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Colosseum [SEP] Introduction
The Colosseum ( ), also known as the Flavian Amphitheatre (; or "Colosseo" ), is an oval amphitheatre in the centre of the city of Rome, Italy. Built of travertine limestone, tuff (volcanic rock), and brick-faced concrete, it was the largest amphitheatre ever built at the time and held 50,000 to 80,000 spectators. The Colosseum is just east of the Roman Forum. Construction began under the emperor Vespasian in AD 72 and was completed in AD 80 under his successor and heir, Titus. Further modifications were made during the reign of Domitian (81–96). These three emperors are known as the Flavian dynasty, and the amphitheatre was named in Latin for its association with their family name "(Flavius)".