This castle has stood witness to the city's major milestones in the history of Naples. Built in 1329 by Charles of Angiò, it is shaped like a six-sided star and gives the spectators a fantastic view of the city. Saint Elmo Castle has been restored and now houses the Molaido Library of Art and a videotheque that gives information on all the city monuments. Exhibitions, shows, concerts and even conferences are held in this historical monument. The castle has a 16th century Church of Saint Elmo and the 17th century Chapel of Santa Maria del Pilar. Admission: EUR 1.