 Complete the following phrase:  During this century, the Ottoman Empire was expanding mightily in southeastern Europe. It completed the absorption of the Byzantine Empire in 1453 under Sultan Mehmet II by conquering Constantinople and Galata. It seized Genoas last bastions in the Black Sea in 1475 and Venices Greek colony of Euboea in 1479. Turkish troops invaded the Friuli region in northeastern Italy in 1479 and again in 14991503. The Apulian harbor town of Otranto, located about 100 kilometers southeast of Brindisi, was seized in 1480 