 Lanzo is mentioned in the early 11th century as "Curtis Lanceii".Later, under several names, was a fief (together with its namesake valleys) to the bishop of Turin, of the house of Savoy and of the Marquisate of Montferrat.In the mid-16th century the Castle of Lanzo, considered amongst the most important in Piedmont, was besieged, stormed (1551) and destroyed by French troops under Charles de Brissac (1551–52).