(n.) The amphitheater of Vespasian at Rome, the largest in the world.

agora amphitheater arena athletic field auditorium background bear garden bowl boxing ring bull ring campus canvas circus cockpit colosseum course field floor forum ground gym gymnasium hall hippodrome lists locale marketplace mat milieu open forum palaestra parade ground pit place platform precinct prize ring public square purlieu range ring scene scene of action scenery setting site sphere squared circle stadium stage stage set stage setting terrain theater tilting ground tiltyard walk wrestling ring