Pantheon is one of the best preserved of all Roman buildings. It has been in continuous use throughout its history, and since the 7th century, the Pantheon has been used as a Roman Catholic church dedicated to "St. Mary and the Martyrs" but informally known as "Santa Maria della Rotonda".
Almost two thousand years after it was built, the Pantheon's dome is still the world's largest unreinforced concrete dome.
One of the original Roman buildings still standing.
