Ottoman Capture of Constantinople Marks End of Byzantine Empire in 1453

During the two‑month siege of Constantinople that culminated on 29 May 1453, Ottoman forces led by Sultan Mehmed II (Mehmed the Conqueror) breached the city’s defenses after constructing the Rumelihisarı fortress and deploying massive cannons. Contemporary estimates place the Ottoman army at over 150,000 men, while the defenders numbered about 7,000, including roughly 700 Genoese mercenaries under Giovanni Giustiniani.

According to Byzantine chroniclers, a few days before the final assault a revered icon of the Panagia Odigitria slipped from the hands of its carriers during a solemn procession, became inexplicably heavy, and was followed by a sudden, violent hailstorm that forced the liturgy to stop. Witnesses interpreted the incident as a divine omen of the empire’s impending fall.

When the walls were breached, Ottoman troops entered the city, looted its streets, captured tens of thousands of inhabitants for slavery, and entered the Hagia Sophia, establishing Ottoman sovereignty over the former Byzantine capital. The conquest ended the Byzantine Empire after more than a thousand years of existence and reshaped the political and cultural landscape of the eastern Mediterranean.