Second fort of San Marino, built on the ruins of a Roman fortress and included in the 16th century in the second set of walls. Its construction dates back to the 13th century. Located on the highest peak of Mount Titano (750 m on the sea level), it offers a unique panorama. The central donjon, like the other two towers, has a pentagonal shape very rare if not unique in contemporary buildings. It currently houses the Museum of Ancient Arms, which has on display hoplological finds dating from the 13th to the 19th century.
