ドムス・アウレア
Construction of the Colosseum started under Vespasian in a low valley surrounded by the Caelian, Esquiline and Palatine hills. The site became available to Nero by the Great Fire of Rome in AD 64 and redeveloped for his personal enjoyment with the construction of a huge artificial lake in the Domus Aurea, and a colossal statue of himself.