Oristano, capital of the Oristanese region, has its origins in the historical events linked to the Giudicato of Arborea. The Tower of Mariano II, an impressive building, known also as the "Porta Manna", is one of the few elements remaining of the old city walls built by the Giudice (Prince) Mariano II in 1291. Oristano presents a number of churches worth a visit, such as that of St. Francesco, with Nicodemo's cross and the painting representing St. Francesco; the dome of the Assunta, with the statue of the Annunziata and the chapel of the Rimedio; the church of St.Chiara. The museum of the "Antiquarium Arborense" is also not to be missed and, among the seaside resort: Marina di Torregrande.