Pantheon

The Pantheon in Rome is an ancient Roman temple. Its dome, built around 125 AD, measures 43.3 meters in both diameter and height and was constructed from Roman concrete mixed with volcanic ash and lime. Inside, a 9-meter oculus in the center of the ceiling replaces windows, and the tombs of Raphael and two Italian kings are visible. On-site lines are long, so advance reservations are required.