Percy Jackson and the Olympians: Legends

The Colosseum (also known as the Coliseum) is an elliptical amphitheater in the center of the city of Rome, Italy. It is the largest arena built during the existence of the Roman Empire and is made of concrete and stone. People entered the Colosseum through eighty arched entrances, each with its own number. Underneath the Colosseum floor was a system of animal cages, rooms, and tunnels. Trap doors in the floor were opened to allow animals and gladiators to enter the arena.