Make your way to the Pantheon to explore the best-preserved monument of ancient Rome. Collect your audio guide at the desk inside the Pantheon to begin learning about its fascinating history. Make use of 15 listening points and a map to locate points of interest inside the basilica. Learn the history of the building and how it later came to be used a church and a mausoleum. The Pantheon, built between 25 and 27 B.C., is the only ancient Roman building that has remained nearly intact through the centuries. Dedicated to all the gods of Pagan Rome, the temple was built by the Emperor Hadrian on the site of an earlier temple commissioned by Marcus Agrippa during the reign of Augustus. Classified as a temple, the original use of the Pantheon and how people worshipped there is unknown as the structure is different from other traditional Roman temples, such as the Roman Forum.