Also known as the Flavian Amphitheatre, the Colosseum was commissioned under the Emperor Vespasian in 72 CE, completed under Emperor Titus, and added on to by Emperor Domitian (Bomgardner 2001: 2). The Colosseum is located on the site of the lake of Nero's Domus Aurea (Bomgardner 2001: 4). The arena measured 76.96 X 46.18 m and the amphitheatre could seat approximately 54,760 people (Bomgardner 2001: 20-21). The numerals on the arcades corresponded with a ticket that spectators had, indicating which entrance to use (Bomgardner 2001: 6).