Mehmed II at the siege of Constantinople,Fausto Zonaro
Days that live in Infamy: The Fall of Constantinople
Sultan Mehmed II's entry into Constantinople. Byzantium is a term used by modern historians to refer to the later Roman Empire. In its time, the empire ruled from Constantinople (or "New Rome" as Constantine had officially named it) was considered simply "the Roman Empire." In Mehmed's view, he was the successor to the Roman Emperor, declaring himself Kayser-i Rum, literally "Caesar of Rome" that is, of the Roman Empire.