Constantinople

Constantinople is a Byzantine city and the last of the Roman Empire. It was the capital city of the Roman Empire (330–395), the Byzantine Empire (395–1204 and 1261–1453), the brief Crusader state known as the Latin Empire (1204–1261), and the Ottoman Empire (1453–1922).

Constantinople was famed for its massive and complex defenses. The Theodosian Walls consisted of a double wall lying about 2 kilometres (1.2 mi) to the west of the first wall and a moat with palisades in front.

The city was built intentionally to rival Rome, and it was claimed that several elevations within its walls matched the 'seven hills' of Rome. Because it was located between the Golden Horn and the Sea of Marmara the land area that needed defensive walls were reduced, and this helped it to present an impregnable fortress enclosing magnificent palaces, domes, and towers, the result of the prosperity it achieved from being the gateway between two continents (Europe and Asia) and two seas (the Mediterranean and the Black Sea). Although besieged on numerous occasions by various armies, the defenses of Constantinople proved impregnable for nearly nine hundred years.

In 1204, however, the armies of the Fourth Crusade took and devastated the city, and its inhabitants lived several decades under Latin rule. In 1261 the Byzantine Emperor Michael VIII Palaiologos liberated the city, and after the restoration under the Palaiologos dynasty, enjoyed a partial recovery. With the advent of the Ottoman Empire in 1299, the Byzantine Empire began to lose territories and the city began to lose population. By the early 15th century, the Byzantine Empire was reduced to just Constantinople and its environs, along with Morea in Greece, making it an enclave inside the Ottoman Empire; after a 53-day siege the city eventually fell to the Ottomans, led by Sultan Mehmed II, on 29 May 1453, whereafter it replaced Edirne (Adrianople) as the new capital of the Ottoman Empire.