The conquest of Constantinople: (May 29, 1453 AC)

Constantinople was besieged by Muhammad II, known as the Conqueror, in April 1453 and took the city on May 29 1453 AC corresponding to 20th Jumada I 857 AH,
and made it the capital of the Ottoman Empire. By which triumph, Muhammad II became among the most famous and acknowledged leaders of the Islamic world.

[Genealogy]