The Duchy of the Archipelago (Greek: Δουκάτο του Αρχιπελάγους, Italian: Ducato dell'arcipelago), also known as Duchy of Naxos or Duchy of the Aegean, was a maritime state created by Venetian interests in the Cyclades archipelago in the Aegean Sea, in the aftermath of the Fourth Crusade, centered on the islands of Naxos and Paros. It included all the Cyclades (except Mykonos and Tinos). In 1537 it became a tributary of the Ottoman Empire, and was annexed by the Ottomans in 1579; however, Christian rule survived in islands such as Siphnos (conquered by the Ottomans in 1617) and Tinos (conquered in 1715).