C. The fall of the Eastern Roman Empire (Byzantium)

When Constantine became Emperor, he moved the capital to Byzantium - now Istanbul, Turkey - and changed its name as the name suggests, is Constantine. Gradually, the Eastern Roman Empire into a formidable empire. At the time of Constantine the Great, Byzantium was the center of government power that influence the development of politics in the region. However, in the 14th century came a new power of the Ottoman empire. in 1453under the leadership of Sultan Mohammed II, the Kingdom is able to control and seize Byzantium