In 1622 Cardinal Maurizio asked for and obtained from the Holy See the erection bull of the Insigne Collegiate of San Lorenzo Martire. At the end of the seventeenth century the numerous raids with looting by the French general Nicolas Catinat stripped the villages, the castle and the churches. 1630 proved to be a particularly critical year for the country, since during the Second Monferrato War (episode to be framed in the 30-year conflict), Giaveno was occupied by French troops led by the Duke of Montmorency.