The Pantheon (Latin Pantheon, rarely Pantheum, from Greek Pantheion, meaning "Temple of all the Gods") is a building in Rome which was originally built as a temple to the seven deities of the seven planets in the state religion of Ancient Rome, but which has been a Christian church since the 7th century. It is the best-preserved of all Roman buildings and the oldest important building in the world with its original roof intact. It has been in continuous use throughout its history. Although the identity of the Pantheon's primary architect remains uncertain, it is largely assigned to Apollodorus of Damascus.

The original Pantheon was built in 27 BC-25 BC under the Roman Empire, during the third consulship of Marcus Vipsanius Agrippa, and his name is inscribed on the portico of the building. The inscription reads M·AGRIPPA·L·F·COS·TERTIUM·
FECIT, "Marcus Agrippa, son of Lucius, having been consul three times, built this." It was originally built with adjoining baths and water gardens.

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