Duecento
Duecento (,  literally "two hundred") or Dugento is the Italian word for the Italian culture of the 13th century. During this period the first shoots of the Italian Renaissance appeared, in literature and art, to be developed in the following trecento period. Characteristics

In the 13th century, much of Europe experienced strong economic growth. The trade routes of the Italian states linked with those of established Mediterranean ports and eventually the Hanseatic League of the Baltic and northern regions of Europe to create a network economy in Europe for the first time since the 4th century. The city-states of Italy expanded greatly during this period and grew in power to become de facto fully independent of the Holy Roman Empire; outside European powers kept their armies out of Italy. During this period, the modern commercial infrastructure developed, with the creation in Italy of the double-entry book-keeping, joint stock companies, an international banking system, a systematized foreign exchange market, insurance, and government debt. Florence became the centre of this financial industry and the gold florin became the main currency of international trade. The Republic of Venice and the Republic of Genova dominated the trade in the Mediterranean sea. Many argue that the ideas that characterized the Renaissance had their origin in late 13th century Florence, in particular with the writings of Dante Alighieri (1265–1321)  as well as the painting of Giotto (1267–1337). The Duecento was followed by the beginning of the Italian Renaissance during the Trecento. Italian literature
The thirteenth-century Italian literary revolution helped set the stage for the Renaissance. During this century, the standard modern Italian language began to be fixed, mainly as a literary language. Previously each region used its own language, as many continue to do, at least in the common spoken language. The standard modern Italian language began in poetic and literary writings of Tuscan and Sicilian writers of the 12th century, and the grammar and core lexicon are basically unchanged from those used in Florence in the 13th century. It was only in the 13th century that Italian authors began writing in their native language rather than Latin, French, or Provençal. The 1250s saw a major change in Italian poetry as the Dolce Stil Novo (Sweet New Style, which emphasized Platonic rather than courtly love) came into its own, pioneered by poets like Guittone d'Arezzo and Guido Guinizelli. Especially in poetry, major changes in Italian literature had been taking place decades before the Renaissance truly began. An increasing number of works began to be written in the Italian language in addition to the flood of Latin and Greek texts that constituted the mainstream of the Italian Renaissance. Written works expanded beyond works of theology and towards the pre-Christian eras of Imperial Rome and Ancient Greece. This is not to say that no religious works were published in this period:  Dante Alighieri's The Divine Comedy reflects a distinctly medieval world view. This masterpiece helped establish the Tuscan language, in which it is written (also in most present-day Italian-market editions), as the standardized Italian language. Christianity remained a major influence for artists and authors, with the classics coming into their own as a second primary influence. Italian painting

Italo-Byzantine (or maniera greca) painting is a term for panel paintings produced in Italy, and Western Europe generally, under heavy influence from the icons of Byzantine art, whose many variations of the subject of the Madonna and Child were copied, though the full Byzantine technique and style was not. This remained the predominant style in Italy until new developments came in Tuscany and Rome later in the century, and remained common in many areas well into the next century and beyond. The art of the region of Tuscany (and northern Italy) in the second half of the 13th century was dominated by two masters: Cimabue of Florence and Duccio of Siena. Their commissions were mostly religious paintings, several of them being very large altarpieces showing the Madonna and Child. These two painters, with their contemporaries, Guido of Siena, Coppo di Marcovaldo and the mysterious painter upon whose style the school may have originated, the so-called Master of St Bernardino, all worked in a manner that was highly formalised and dependent upon the ancient tradition of icon painting. Cimabue and Duccio both took steps in the direction of greater naturalism, as did their contemporary, Pietro Cavallini of Rome. Giotto (born in 1266) by tradition a shepherd boy from the hills north of Florence, became Cimabue's apprentice and emerged as the most outstanding painter of his time, though his most famous works came early in the following century. Giotto, possibly influenced by Pietro Cavallini and other Roman painters, did not base the figures that he painted upon any painterly tradition, but upon the observation of life. Unlike those of his Byzantine-related  contemporaries, Giotto's figures are solidly three-dimensional; they stand squarely on the ground, have discernible anatomy and are clothed in garments with weight and structure. But more than anything, what set Giotto's figures apart from those of his contemporaries are their emotions. In the faces of Giotto's figures are joy, rage, despair, shame, spite and love. The cycle of frescoes of the Life of Christ and the Life of the Virgin that he painted in the Scrovegni Chapel in Padua set a new standard for narrative pictures. His Ognissanti Madonna hangs in the Uffizi Gallery, Florence, in the same room as Cimabue's Santa Trinita Madonna and Duccio's Ruccellai Madonna where the stylistic comparisons between the three can easily be made. One of the features apparent in Giotto's work is his observation of naturalistic perspective. He is regarded as the herald of the Renaissance. Italian architecture

Italian Gothic architecture began to appear in the early Duecento in northern Italy, under influence from France. The first Italian Gothic edifices were Cistercian abbeys, soon followed by Franciscan and Dominican churches. They spread in the whole Italian territory, often adapting the construction techniques to the local traditions. Brickwork was most common in the Po Valley, while stone prevailed in central Italy and Tuscany, where polychrome wall decoration sometimes continued from the local Romanesque tradition. The most important buildings include Chiaravalle Abbey in northern Italy and Casamari Abbey in central Italy. Among the non-Cistercian buildings of this century which were influenced by the Gothic style, though still presenting important Romanesque features, are the Parma Baptistery by Benedetto Antelami and the church of Sant'Andrea in Vercelli, also featuring Antelami's influences. This century saw the construction of numerous Gothic buildings for the Mendicant Orders. The most important ones include:
Basilica of San Francesco of Assisi (1228–1253)
Church of Santa Maria della Spina, Pisa (1230)
Basilica of Sant'Antonio of Padua
Church of San Francesco, Bologna (1236–1263)
Church of Santa Maria Novella, Florence

Also notable is the civil and military construction program promoted by Emperor and King of Sicily Frederick II of Hohenstaufen in southern Italy at the beginning of the century. The most important works promoted by him include:

Castel del Monte, in Apulia
Castel Maniace, in Syracuse, Sicily
City Gate of Capua, an imperial Romanesque evocation of a Roman triumphal arch, in Capua. This is now destroyed though some of the sculpture is in museums. In this period some cathedrals were also constructed or finished, such as Siena Cathedral. Gallery

See also
Trecento – the 14th century in Italian culture
Quattrocento – the 15th century in Italian culture
Cinquecento – the 16th century in Italian culture
Seicento – the 17th century in Italian culture
Settecento – the 18th century in Italian culture
Ottocento – the 19th century in Italian culture
Novecento - the 20th century in Italian culture
History of Italy

Notes

Bibliography
 Burke, Peter. The Italian Renaissance: Culture and Society in Italy Princeton University Press. Princeton, 1999. Shaw, Prue. Reading Dante: From Here to Eternity. Liveright Publishing. New York, 2014  . Nolthenius, Helene. ‘’ Duecento:  The Late Middle Ages in Italy’’. McGraw-Hill. New York, 1968. White, John. Art and Architecture in Italy, 1250 to 1400, London, Penguin Books, 1966, 3rd edn 1993 (now Yale History of Art series). 13th century in Italy
Italian Renaissance