Pantheon
停止: 30 minutes
The Pantheon 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.
The building is cylindrical 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 un-reinforced concrete dome. The height to the oculus and the diameter of the interior circle are the same, 43 metres (142 ft).
It is one of the best-preserved of all Ancient Roman buildings, in large part because it has been in continuous use throughout its history