Although it was called an arena, it actually consisted of many arenas. The building itself was not smaller than the five main buildings around the main plaza. The building housed many amphitheaters, which served as the arenas. They were open-air and provided seats for spectators.
Though many parts of the building were open-air, it had only one entrance. The open amphitheaters were covered by invisible barriers. Everyone who wished to enter the arena had to go through the entrance. Behind the entrance was a lobby where one could submit the request to use the arena. Even spectators had to register in this lobby before they were allowed entrance into the arena.
