Where? Pantheon

The Pantheon was originally a place to worship all of the Roman gods and goddesses. Marcus Agrippa built it and dedicated it to the gods. Ever since the Renaissance, the Pantheon was used for burials. Now, the Pantheon is still a Catholic church, where masses are celebrated to this day.

http://www.travelplan.it/rome_guide_monuments.htm

http://en.wikipedia.org/wiki/Pantheon