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 were fertile and suitable for new development. Thus it was during the 11th century, when Palaiopoli was abandoned in favour of the plain of Messaria on Andros, that the breeding of silkworms, which ensured the island's wealth until the 19th century, was introduced. In 1204, the Fourth Crusade took Constantinople, and the conquerors divided the Byzantine Empire amongst themselves. Nominal sovereignty over the Cyclades fell to the Venetians, who announced that they would leave the islands’ administration to whoever was capable of managing it on their behalf. In effect, the Most Serene Republic was unable to handle the expense of