Duchy of Athens

Also known as Ducatus Athenarum

The Frankish duchy that ruled Athens, Thebes, and most of central Greece for over two and a half centuries — passing in turn through Burgundian, Catalan, and Florentine hands.

The Duchy of Athens was founded by Otto de la Roche, a Burgundian knight of the Fourth Crusade, who took possession of Athens and Thebes in 1205 with the title 'Lord' and the unofficial style 'Duke'; full ducal status was confirmed by Louis IX of France in 1260. Under the de la Roche dynasty (1205–1308) and their Brienne cousins, the duchy held most of central Greece — Attica, Boeotia, parts of Thessaly — and was a wealthy producer of silk, glass, and grain.

In 1311 the duchy was overthrown by the Catalan Company, a band of Aragonese mercenaries originally hired by the Byzantines and now adrift in Greece looking for territory. At the Battle of Halmyros (15 March 1311) they annihilated the Frankish chivalry — perhaps eight hundred knights killed in a single day — and seized the duchy for themselves. Catalan rule (1311–1388) governed the duchy from Thebes as a frontier outpost of the Crown of Aragon and the Kingdom of Sicily.

The Catalans were displaced in turn by the Florentine Acciaioli family in 1388, who held Athens until the Ottoman conquest. Sultan Mehmed II's troops took the city in 1456; the last Florentine duke, Franco Acciaioli, surrendered the Acropolis in 1458, ending the longest-lived Frankish duchy in Greece.

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