Nidastore Castle – or "nest of goshawks", the birds used for hunting in the Middle Ages – is the northernmost castle in Arcevia and sits on the border with the province of Pesaro. Nidastore was constructed in the mid-XII century and was always fought over by the bishop of Fossombrone and Roccas Contrada. In 1408 the castle was granted to the grandson of Bishop Raniero di Taddeo of the Ranieri family of Pesaro, who was killed by refugees from Rocca Contrada. This episode is linked to the story according to which Ranieri was murdered by men from Nidastore following his insistence on his driot de seigneur. In 1462, Pope Pius II recognised Rocca Contrada as the rightful rulers of the castle. The town itself dates to the second half of the 1400s: the walls, on which there are homes and several palazzi with XVI and XVII century doors, is beautifully preserved.