The Temple of Hadrian, devoted to the God Hadrian is located in the Piazza di Pietra. It is famous for its magnanimous eleven 15-metre high columns that support the roof. Once mistakenly known as the Temple of Neptune, the ancient building had 15 columns but four of these were lost with time. Today only 11 columns remain and these have been removed from the original site and incorporated into the Carlo Fontana Palace a 17th century structure, now occupied by commercial businesses.
Attractions & Landmarks, Religious