<P> The Fall of Constantinople ( Greek : Ἅλωσις τῆς Κωνσταντινουπόλεως , Halōsis tēs Kōnstantinoupoleōs ; Turkish : İstanbul'un Fethi Conquest of Istanbul ) was the capture of the capital of the Byzantine Empire by an invading Ottoman army on 29 May 1453 . The attackers were commanded by the then 21 - year - old Sultan Mehmed II , who defeated an army commanded by Emperor Constantine XI Palaiologos and took control of the imperial capital , ending a 53 - day siege that had begun on 6 April 1453 . After conquering the city , Sultan Mehmed transferred the capital of his Empire from Edirne to Constantinople , and established his court there . </P>
<P> The Fall of Constantinople ( Greek : Ἅλωσις τῆς Κωνσταντινουπόλεως , Halōsis tēs Kōnstantinoupoleōs ; Turkish : İstanbul'un Fethi Conquest of Istanbul ) was the capture of the capital of the Byzantine Empire by an invading Ottoman army on 29 May 1453 . The attackers were commanded by the then 21 - year - old Sultan Mehmed II , who defeated an army commanded by Emperor Constantine XI Palaiologos and took control of the imperial capital , ending a 53 - day siege that had begun on 6 April 1453 . After conquering the city , Sultan Mehmed transferred the capital of his Empire from Edirne to Constantinople , and established his court there . </P>
who did the ottoman empire defeated in 1453
who did the ottoman empire defeated in 1453
an army commanded by Emperor Constantine XI Palaiologos
an army commanded by Emperor Constantine XI Palaiologos