They were mostly Christian, and after 1054, split from the catholic, or universal church, and are usually referred to as "Greek Orthodox."
The Capital of the Byzantine Empire was originally called Byzantium before being renamed as Constantinople (which was its name during its control by the Byzantine Empire) and renamed by Ottomans as Istanbul afterwards. Constantinople was the capital of the Byzantine empire
The Byzantine empire was where the eastern empire of Rome used to be, with its capital being Constantinople.
Alexios I Comnenos, Constantinople
It was the Orthodox Church, or The Eastern Orthodox Church.
The Byzantine Empire did not recover from the fall of Constantinople to the Turks because the Turks were a strong local power which captured all of the remaining byzantine territory. Whereas the 4th Crusaders were few in number after they divided up the empire and they only captured part of the Byzantine Empire, the remainder of the Empire split into independent Byzantine powers, one of which the Empire of Nicaea eventually recaptured Constantinople and restored the Byzantine Empire.
The Byzantine Empire was Ruled by the Greek Orthodox Church, centered in the Hagia Sophia in Constantinople, under Occupation by Turkish Muslims since 1452.
Byzantium, renamed Constantinople.
Constantinople
The Capital of The Byzantine Empire was Constantinople.
Constantinople
The state religion of the Byzantine Empire, during the entire time we refer to it by that name, was Christianity.
the capital of the Byzantine Empire was Constantinople.