History of the Cyclades 6th century BC). The Persians tried to take them during their attempts to conquer Greece. Then they entered into Athens' orbit with the Delian Leagues. The Hellenistic kingdoms disputed their status while Delos became a great commercial power. Commercial activities were pursued during the Roman and Byzantine Empires, yet they were sufficiently prosperous as to attract pirates' attention. The participants of the Fourth Crusade divided the Byzantine Empire among themselves and the Cyclades entered the Venetian orbit. Western feudal lords created a certain number of fiefs, of which the Duchy of Naxos was the most important. The Duchy was conquered
History of the Cyclades through an "ahdname" (agreement), granted privileges to the largest of the Cyclades (those of the Duchy of Joseph Nasi). In exchange for an annual tribute that comprised a poll tax and military protection, the Christian landowners (Catholic and Orthodox) kept their lands and their dominant position, negotiating taxes for their community. Thus a specific local law came into being, a mixture of feudal customs, Byzantine traditions, Orthodox canon law and Ottoman demands, all adapted to the particular island's situation. This legal idiosyncrasy meant that only native-born authorities could untangle cases. Even the language of the documents issued was a mixture