Instructions: In this task you will be given an answer to a question. You need to generate a question. The answer given should be a correct answer for the generated question.
Input: Constantinople (Greek: Konstantinoupolis; Latin: Constantinopolis) was the capital city of the Roman / Byzantine (330 -- 1204 and 1261 -- 1453), and also of the brief Latin (1204 -- 1261), and the later Ottoman (1453 -- 1923) empires. It was reinaugurated in 324 AD from ancient Byzantium as the new capital of the Roman Empire by Emperor Constantine the Great, after whom it was named, and dedicated on 11 May 330 AD.
Output:
how long was constantinople the center of the roman empire