The Castel Capuano, whose name is owed to the proximity of the ancient Door " Capuana " that introduced on the road that conducted to Capua, was built by the Normans in the 12^th century. Subsequently it was widened by the Svevis, and it was one of royal palaces of the Aragonesis up to 15^th century. Castle's foundation is traditionally attributed to William I. Restore by Charles I it remained a royal residences; closed in Aragonese time  inside the new fencing wall, the Castle lost definitely the military character, to change in a residence. During the centuries the Castle was repeatedly restructured, and during the government of Pedro of Toledo, it was destined to entertain  all courts of justice of the city, while the undergrounds were turned to jails. The Castle became so the Vicaria, the building of Justice; function that it still maintains.