After he gained control of the roman empire, constantine moved the capital to a. byzantium and renamed it constantinople. b. rome and renamed it constantinople.. c. created a second capital in byzantium. d. created a second capital in constantinople.

After Constantine gained control of the Roman Empire, he moved the capital to Byzantium and renamed it Constantinople. Option A is correct.

This was the new capital of the Eastern Roman Empire and  today is named Istanbul, the biggest city of Turkey. 

Constantinople was the capital city of the Byzantine Empire and as well as of the brief Crusader state known as the Latin Empire, until finally falling to the Ottoman Empire.

the french gave their support to another tribe during he war.