Byzantine Greece - Normans and Franks

Normans and Franks

Greece and the empire as a whole faced a new threat from the Normans of Sicily in the late 11th century. Robert Guiscard took Dyrrhachium and Corcyra in 1081 (see Battle of Dyrrhachium), but Alexius I defeated him, and later his son Bohemund, by 1083. The Pechenegs also raided Thrace during this period.

In 1147 while the knights of the Second Crusade made their way through Byzantine territory, Roger II of Sicily captured Corcyra and pillaged Thebes and Corinth. In 1197 Henry VI of Germany continued his father Frederick Barbarossa's antagonism towards the empire by threatening to invade Greece to reclaim the territory the Normans had briefly held. Alexius III was forced to pay him off, although the taxes he imposed caused frequent revolts against him, including rebellions in Greece and the Peloponnese. Also during his reign, the Fourth Crusade attempted to place Alexius IV on the throne, until it eventually invaded and sacked the capital.

Greece was relatively peaceful and prosperous in the 11th and 12th centuries, compared to Anatolia which was being overrun by the Seljuks. Thessalonica had probably grown to about 150,000 people, despite being looted by the Normans in 1185. Thebes also became a major city with perhaps 30,000 people, and was the centre of a major silk industry. Athens and Corinth probably still had around 10,000 people. Mainland Greek cities continued to export grain to the capital in order to make up for the land lost to the Seljuks.

However, after Constantinople was conquered during the Fourth Crusade in 1204, Greece was divided among the Crusaders. The Latin Empire held Constantinople and Thrace, while Greece itself was divided into the Kingdom of Thessalonica, the Principality of Achaea, and the Duchy of Athens. The Venetians controlled the Duchy of the Archipelago in the Aegean, and the Despotate of Epirus was established as one of the three Byzantine Greek successor states.

Michael VIII restored the empire in 1261, having also regained the Kingdom of Thessalonica. By his death in 1282, Michael had taken back the Aegean islands, Thessaly, Epirus, and most of Achaea, including the Crusader fortress of Mystras, which became the seat of a Byzantine despotate. However, Athens and the northern Peloponnese remained in Crusader hands. Charles of Anjou and later his son claimed the throne of the defunct Latin Empire, and threatened Epirus and Greece, but were never able to make any progress there.