Often called Maschio Angioino, located in front of Piazza Municipio in central Naples. The castle, first erected in 1279, one of the main architectural landmarks of the city. It was a royal seat for kings of Naples, Aragon and Spain until 1815. It is the headquarters of Neapolitan Society of Homeland History and of the Naples Committee of the Institute for the History of the Italian Risorgimento.
The project was designed by the French architect Pierre de Chaulnes, the construction of the Castrum Novum started in 1279 to finish just three years later, a very short time considering the techniques of construction of the period and the overall size of the work. It reconstructed by Alfonso V of Aragon has an irregularly trapezoidal plan and was defended by five large cylindrical towers.
The Castel Nuovo, in the course of its history, has been used several times as a temporary residence to host illustrious personalities. Among the main personalities, beside Neapolitean, Aragonese and Spanish monarchs, are: Giovanni Boccaccio, Giotto, Pope Boniface VIII, Pope Celestine V and Petrarch.