The Pantheon (from Greek: Πάνθεον, an adjective meaning ” to all gods”) is a building in Rome, Italy, commissioned by Marcus Agrippa as a temple to all the gods of Ancient Rome, and rebuilt by Emperor Hadrian in about 126 AD. 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.