How many centuries did the Byzantine Empire existed?

The Byzantine Empire was able to exist for almost 11 centuries. So it was founded in 330. The process of its active development began after the collapse of the Western Roman Empire in the 5th century. In the period from 5 to 11th century, Byzantium was one of the most powerful and influential powers in the world. True, due to permanent uprisings, as well as external factors, she fell into decay. In the 15th century, Seljuky Turks fully captured its territory, including the city of Constantinople.