Castles, palaces and mansions Castello di Verrone The Castle of Verrone dates back between the 11th and 12th centuries and was a residential home of the Ghibelline faith family of the Vialardi. The structure has a quadrangular shape and its oldest part is a massive tower located to the southwest. After 1835 the castle was purchased by the botanist Maurizio Zumaglini. It is currently in good condition and is the property of the Municipality.