Constantinople
Constantinople (; ) was the capital city of the Roman/Byzantine Empire (330–1204 and 1261–1453), and also of the brief Crusader state known as the Latin Empire (1204–1261), until finally falling to the Ottoman Empire (1453–1923). It was reinaugurated in 324 from ancient Byzantium as the new capital of the Roman Empire by Emperor Constantine the Great, after whom it was named, and dedicated on 11 May 330. The city was located in what is now the European side and the core of modern Istanbul.
Treaty of Constantinople (1454)
The Treaty of Constantinople was signed on April 18, 1454 between the Ottoman Empire and the Republic of Venice. It was the first treaty signed by the Turkish Sultan following the capture of Constantinople in 1453. It effectively ended Venetian aspirations to eliminate the Ottoman Empire or to conquer Constantinople on behalf of Christendom. The treaty gave the Republic of Venice freedom to trade in the Eastern Mediterranean.