The Pantheon (temple of all the Roman gods) is a former Roman temple. 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 Vipsanius Agrippa during the reign of Augustus (27 BC – AD 14); then, after the original burnt down, the present building was ordered by the emperor Hadrian AD 126. Our Professional Guide will give you a round of Pantheon with skip the line access to it. The guide will tell you the history and show you the marvellous architecture. You will have a look at the 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.