Of Lombard or maybe of Byzantine origins, it was the seat of the Lombard "giudicaria" and subsequently of the Count Palatino Franco. In 1014 it was given as a gift by Henry of Saxony to the Church of Novara, and it became a Bishop residence. In 1381 it passed to the Visconti in Milan and it was destroyed in 1415 by the Swiss who were there to conquest the Ossola.