***Mehmed II went on to conquer the Greek statelets of Mistra*** in 1460 and Trebizond in 1461. The nephew of the last Emperor, Constantine XI, Andreas Palaeologos had inherited the defunct title of Byzantine Emperor and used it from 1465 until his death in 1503.[6] By the end of the 15th century, the Ottoman Empire had established its firm rule over Asia Minor and parts of the Balkan peninsula. Mehmed II and his successors continued to consider themselves proper heirs to the Byzantine Empire until the demise of the Ottoman Empire in the early 20th century. Meanwhile, the Danubian Principalities harbored Orthodox refugees, including some Byzantine nobles.
Source: Wikipedia - Entry for "Byzantine Empire"

... are a very rare surviving late Byzantine cycle, crucial for the understanding of ...
Source: http://www.smso.net/Mistras