The artists seem to have consulted written accounts of Catherine de' Medici's court festivals. Some of the entertainments recorded in the tapestries can be identified with known events, such as the festivals mounted at Fontainebleau and at Bayonne during Charles IX's royal progress of 1564–65; and the ball held for the Polish ambassadors at the Tuileries in 1573. Particularly lavish were the tournaments and "fêtes" held in 1565 in Bayonne, near the Spanish border of France, where Catherine de' Medici met with her daughter Elisabeth, Queen of Spain, amidst rituals of display from both courts. The latest event identifiable in the tapestries was held in 1573 at the Tuileries, where Catherine laid on a ball for ambassadors from the Polish governing council, who had elected her son Henry as king of Poland. The costumes worn by the courtiers in the tapestries have been dated to not later than c. 1580.[[File:Margot Francois.jpg|thumb|Example of the unnamed artist's inclusion of full bodied portraits against Caron's chaotic backdrops.