Filippo Maria, Duke of Milan then negotiated an agreement wherein he would make peace with Amadeus VIII by Filippo Maria marrying Amadeus daughter, Marie and as part of the marriage agreement she would be given Vercelli as her dower lands.
[3] The marriage was celebrated in a lavish feast at Château du Bourget-du-lac held by the brides father.
[5] Marie's husband was a capable ruler but he had a suspicious and paranoid nature after experiencing his older brother the former duke having been assassinated by his close attendants.
[7] Deeply superstitious he paid huge sums to astrologers and magicians to find a way for him to have a son and heir.
[9] After the death of Filippo Maria in 1442 Marie tried to advocate for her brother Louis of Savoy to become the next duke of Milan.
[3] but when he died before her, she instead left it to Louis of Achaea, the step-son of her paternal aunt Bonne of Savoy [it], and to a niece.
[citation needed] Marie requested that she be buried in the church of Santa Maria di Billiemme in Vercelli.