- Italy in the early Middle Ages
- Italy in the 14th and 15th centuries
- Early modern Italy (16th to 18th century)
- Revolution, restoration, and unification
- Italy from 1870 to 1945
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Frederick was the giant of the 12th-century Italian stage. He lived through a period of dramatic social and economic changes. Genoa, Pisa, and Venice became international powers during this period, with commercial interests stretching from northern Europe to Africa and the Levant. The growth of population in both town and countryside brought about an increase in public works, ranging from town walls to canals. The development of guilds and confraternities reflected the growing complexity of economic organization. Even the smallest cities had their professional elite of judges and notaries alongside the nobles, merchants, and craftsmen. The vigour of the economy found its expression in the construction of new and larger cathedrals, the one at Pisa being among the most notable. Overseas trade and investment increased domestic wealth, leading to the embellishment of cities.
Culture, in turn, produced its own coin. In the Norman south, medical studies developed in Salerno. Although the kingdom of Sicily did not become a major centre for the transmission of Byzantine and Islamic cultures to Europe as did Spain, it nonetheless played a significant subsidiary role. Al-Sharīf al-Idrīsī, the famous Arab geographer, dedicated his three major works on geography to Roger II of Sicily. George of Antioch and, later, Eugenius the Admiral were important translators of Greek works into Latin. Capua, Montecassino, Benevento, and Salerno contributed to the Latin cultural tradition from their own rich patrimonies. Historical writing flourished in the hands of Amatus of Montecassino, Romuald of Salerno, Geoffrey Malaterra, and Falco of Benevento. Already in the 11th century an international clerical culture had emerged in the writings of reformers such as Humbert of Silva Candida and Peter Damian, and it grew under the influence of figures such as Bernard of Clairvaux and John of Salisbury. On the local level, Roman civic culture found its expression in clerical circles around the great basilicas and in secular circles around the prefect and, later, the senators. The north produced an early harvest of the civic spirit in the annals of the Genoese Caffaro di Caschifellone and his successors. Although imperial themes often found a place in these cultural developments, underlying loyalties were local. Only slowly did signs of an international lay culture—largely under French influence—emerge. By the late 12th century the whole of Italy had undergone a major economic and cultural transformation that was to provide a rich basis for the 13th century.