The city of Constantinople falls to the Crusaders on April 12, 1204 during the Fourth Crusade, second siege. The city was sacked for three days as the crusaders loot holy relics, destroyed ancient artwork, and committed widespread violence during their brutal attack.
The Crusaders established the Latin Empire (1204–1261), which splintered the Byzantine state into smaller successor states. But the brutality and cruelty of the attack fueled the the permanent The Byzantines recovered the city in 1261 but the empire was never able to regain its former strength and it eventually fell to the Ottoman Empire on May 29, 1453, when Sultan Mehmed II's forces captured Constantinople after a lengthy siege, marking the end of the Byzantine Empire and the city becoming Istanbul, the new Ottoman capital.