Frossasco later was owned by the abbey of Novalesa, which donated it in 1064 to the Santa Maria Cloister of Pinerolo owned by the Marchioness Adelaide of Susa. The hamlet was given in 1561 to the Count Provana of Leyni and, later on, from 1536 to 1539, was occupied by the French. It went back to the House of Savoy but was again under the French between 1593 and 1595, until it became an Italian municipality.