The Roman structure, begun during the reign of Vespasian (ruled A.D. 69–79), was disassembled during the Middle Ages (500–1350) when its stones and brocks were removed and used to construct other buildings. The Colosseum, situated in the center of the city of Rome, was a giant, outdoor theater. Between 80 and 404, it was an entertainment center where battles were staged, gladiators competed, and men fought wild animals. It could seat 50,000 spectators who were separated from the arena by a 15-foot wall.