Elisabeth and her brother met their respective spouses for the first time on 25 November 1615 on the Pheasant Island in the river Bidassoa that divides France and Spain between the French city of Hendaye and the Spanish city of Fuenterrabía. This was the last time Louis would see his sister. In Spain, Elisabeth's French name took on the Spanish form of Isabel. The religious ceremony took place in the Saint Mary Cathedral in Burgos. At the time of her marriage, the thirteen-year-old Isabel became the new Princess of Asturias. This marriage followed a tradition of cementing military and political alliances between the Catholic powers of France and Spain with royal marriages. The tradition went back to 1559 with the marriage of King Philip II of Spain with the French princess Elisabeth of Valois, the daughter of King Henry II of France, as part of the Peace of Cateau-Cambrésis. The Exchange of the Princesses at the Spanish Border was painted by Peter Paul Rubens as part of his Marie de' Medici cycle. Queen Elisabeth was renowned for her beauty, intelligence and noble personality, which made her very popular in Spain. In 1621, by the time of the birth of the couple's first child, the couple had ascended to the throne of Spain upon the death of Philip III of Spain. The new queen of Spain was aware that her husband had mistresses. Elisabeth herself was the subject of rumors about her relations with the noted poet Peralta (Juan de Tassis, 2nd Count of Villamediana), who was her gentleman-in-waiting. On 14 May 1622, a fire broke out while the Peralta masque La Gloria de Niquea was being acted before the court. Peralta carried the queen to a place of safety, which caused suspicion about their relationship to deepen. Peralta neglected a significant warning that his life was in peril, and "he was murdered as he stepped out of his coach. The responsibility for his death was divided between Philip IV and Olivares" (at the time, prime minister and king's favorite). She was regent of Spain during the Catalan Revolt and supported the Duke of Nochera against the Count-Duke of Olivares in favor of an honorable withdrawal from the Catalan Revolt. Prior to 1640, the queen does not appear to have had much influence over state affairs, which was largely entrusted to Olivares. Elisabeth did not get along with Olivares, who reportedly