From 1395 to 1402 the Venetians briefly controlled the Duchy. In 1444 Athens became a tributary of Constantine Palaeologus, the despot of Morea and heir to the Byzantine throne. In 1456, after the Fall of Constantinople (1453) to the Ottoman Empire, Turahanoğlu Ömer Bey conquered the remnants of the Duchy. Despite the Ottoman conquest, the title of "Duke of Athens and Neopatras" continued in use by the kings of Aragon, and through them by the Kings of Spain, up to the present day.