The Pantheon in Rome is a remarkable building architecturally. Basically a cylinder with the floating dome on top of columns, it is the largest masonry vault ever built. In the center of this dome is a hole bringing in a shaft of light to show the beauty of this building and its relatively simple, open interior. Being inside the Pantheon feels very special.
Originally built in 27 BC and rebuilt by Emperor Hadrian in 120 AD, the temple has been damaged and plundered over time. In 609 AD it became a Christian church dedicated to the Madonna. In the 17th century some of its bronze ceiling was taken and melted down for use in St Peter's Basilica. Important figures such as King Victor Emmanuel II and the artist Raphael are buried in the Pantheon.