Pantheon - Credit: Wikimedia Commons
The Pantheon (, ; ,Although the spelling Pantheon is standard in English, only Pantheum is found in classical Latin; see, for example, Pliny, Natural History 36.38: "Agrippas Pantheum decoravit Diogenes Atheniensis". See also Oxford Latin Dictionary, s.v. "Pantheum"; Oxford English Dictionary, s.v. "Pantheon": "post-classical Latin pantheon a temple consecrated to all the gods (6th cent.; compare classical Latin pantheum)". from Greek Pantheion, "[temple] of all the gods") is a former Roman temple and, since AD 609, a Catholic church (Basilica Santa Maria ad Martyres or Basilica of St. Mary and the Martyrs) in Rome, Italy. It was built on the site of an earlier temple commissioned by Marcus Agrippa during the reign of Augustus (27 BC – AD 14), then after that burnt down, the present building was ordered by the emperor Hadrian and probably dedicated AD 126. Its date of construction is uncertain, because Hadrian chose not to inscribe the new temple but rather to retain the inscription of Agrippa's older temple. Read more on Wikipedia
Source: en.wikipedia.org