She married Henry IV of France in October 1600 following the annulment of his marriage to Margaret of Valois. The wedding ceremony in Florence, Italy, which Henry who married her by proxy did not attend was celebrated with 4,000 guests and lavish entertainments, including examples of the newly invented musical genre of opera, Jacopo Peri's Euridice. She brought as part of her dowry 600,000 crowns. Her eldest son, the Future King Louis XIII, was born at Fontainebleau the following year.