<Tr> <Th> Related </Th> <Td> Marcus Vipsanius Agrippa, Hadrian, Apollodorus of Damascus </Td> </Tr> <Tr> <Td_colspan="2"> Pantheon </Td> </Tr> <P> The Pantheon (UK: / ˈpænθiən /, US: / - ɒn /; Latin: Pantheum, from Greek Πάνθειον Pantheion, "(temple) of all the gods") is a former Roman temple, now a church, in Rome, Italy, on the site of an earlier temple commissioned by Marcus Agrippa during the reign of Augustus (27 BC--14 AD). It was completed by the emperor Hadrian and probably dedicated about 126 AD . 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, which had burned down . </P> <P> The building is circular with a portico of large granite Corinthian columns (eight in the first rank and two groups of four behind) under a pediment . A rectangular vestibule links the porch to the rotunda, which is under a coffered concrete dome, with a central opening (oculus) to the sky . Almost two thousand years after it was built, the Pantheon's dome is still the world's largest unreinforced concrete dome . The height to the oculus and the diameter of the interior circle are the same, 142 feet (43 m). </P>

Who built the pantheon and what was its function
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