After this event, Isidore of Kiev wrote to Pope Nicholas V detailing how he survived by dressing up a dead body in his cardinal robes. The Blachernae 
After this event, Isidore of Kiev wrote to Pope Nicholas V detailing how he survived by dressing up a dead body in his cardinal robes. The Blachernae district and Giovanni Giustiniani were integral to the defense in this conflict. Basilica cannons designed by the Hungarian engineer Urban damaged the defenders' walls. Chains connected forts on both sides of the Bosporus before this event. Following this event, the Ottoman army looted a city for three days and the Hagia Sophia was converted into a mosque. For 10 points, name this 1453 siege which saw the Ottomans sack the capital of the Byzantine Empire.
After this event, Isidore of Kiev wrote to Pope Nicholas V detailing how he survived by dressing up a dead body in his cardinal robes.
fall of Constantinople [accept clear knowledge equivalents like sack of Constantinople] 