Palazzo is one of the area’s most characteristic castles. It sits at 508 metres on the slopes of Mt. Cadino in the upper valley of the Fenella river. In 1130 it was donated to the Fonte Avellana hermitage. In the Middle Ages it was owned by the archbishops of Ravenna and then fought over by the bishops of Fossombrone and Sanigallia. As the XIII century came to a close, it came under the dominion of Arcevia after a victorious war against the city of Fossombrone. Its medieval urban structure has remained almost entirely intact and it still has imposing sections of stone and terracotta walls and a lovely XV century gateway. The parish church of Sts. Settimio and Stefano (1^st half of the XVIII century), an imposing late-Baroque structure – most likely the work of an exponent of the Vici family of architects from Palazzo – with splendid marble altars and a gracious Venetian painting from the XVIII century, the Private Oratory of S. Venanzio (1751-1759) built on a design by Arcangelo Vici and with a remarkable frescoed interior, are all worthy of note.