Construction of the Colosseum began under the rule of the Emperor Vespasian[5] in around 70–72 AD, funded by the spoils taken from the Jewish Temple after the Siege of Jerusalem.[15] The site chosen was a flat area on the floor of a low valley between the Caelian, Esquiline and Palatine Hills, through which a canalised stream ran. By the 2nd century BC the area was densely inhabited