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.
Christian monasticism before 451
Solitary spots, according to Basil, should be chosen as sites for monasteries. Nevertheless, they soon found their way into cities. According to one scholar, at least fifteen monasteries were founded at Constantinople in the time of Constantine the Great; but others affirm that the three most ancient ones only dated back to the time of Theodosius (375-95). In 518 there were at least fifty-four monasteries in Constantinople. Their names and those of their rulers are given in a petition addressed by the monks of Constantinople to Pope Hormisdas in 518.