The Pantheon is one of the most important places of worship in Roman Christianity. It was built under Emperor Augustus by Marcus Vipsanus Agrippa in 27 BC, a name that can still be seen today on the pediment of the monument. Built in honour of all the gods, the name PANTHEON means "temple of all the gods". Under Emperor Hadrian it was rebuilt, so a porticoed square was opened in front of the monument. After a long period of neglect, in 600 A.D. Pope Boniface IV consecrated the Pantheon as the Basilica of Santa Maria ad Martyres, countering the pagan connotation it had until then. Many Renaissance artists rest here, including Raphael and Queen Margherita with King Umberto I.

Curious anecdote: inside the Pantheon it rains, in fact on the dome there is a hole of 9 meters in diameter from which rainwater enters, but the conformation of the floor prevents the formation of puddles.