Visiting St. Clermont's Cathedral is like a glimpse of the multifaceted history of Rome. Across the courtyard, you will find that the 12th century church, which is high and level with the ground, was built on the basis of a church in the 4th century A.D., which was also built on the site of the 1st century Roman Guild Hall. In the 2nd century AD, a pagan temple was also included in the guild hall, which is said to date back to the fountains of the Roman Republic.