WORLD HISTORY

Detailed explanation-1: -The Byzantine Empire lasted for a millennium after the fall of the Roman Empire, ending with the Ottoman conquests in 1453.

Detailed explanation-2: -The Byzantine Empire was under constant attack from different groups. In the west, the Lombards attacked. In the north, it faced constant threats from the Slavs, Avars as well as the Bulgars.

Detailed explanation-3: -Finally, Constantinople was attacked in the 15th century by a new power, a powerful Islamic state called the Ottoman Empire. The Ottomans captured Constantinople in 1453 CE, renaming it Istanbul and putting an end to the Byzantine Empire.