Pantheon is the first temple that warship all gods. One of Romes' best preserved monuments. The purpose of the structure is unknown, though it might be a location the emperor makes a public appearance. Did you know the present Pantheon is the third Pantheon, it's the third because the first pantheon was burnt by a great fire, the second stuck by lightning, and third is the one left in Rome, built by emperor Hadrian. All of the Pantheon was built on the same location to honor the original dedicator, Marcus Agrippa, who was a close friend, and lieutenant to the first emperor Augustus.