The second most ancient castle of Naples after Castel dell'Ovo, built in 12th century by the Normans over a necropolis for use as a royal palace. It was then used as a residence for distinguished visitors such as Francesco Petrarca, and also as site for royal weddings and ceremonies. In 1503 it became the seat of city's courthouse for almost half a millennium, until the year 1995. Its name derives from its proximity to the road that led to Capua.