Castle of Billi

Built in the Middle Ages, in the highest part, where at the end of the nineteenth century the iron cross was erected, there are some ruins of the Castle of Billi, today called Rupe: the most impressive of all is the Malatesta Towers of the fifteenth century. Part of the citadel was incorporated into the Monastery of the Augustinian nuns. Being a closed order it is not possible to visit the structure inside but only externally.