Even after the opening of the XIII century the St. Denis school exerted influence, as is shown by the Charlemagne-Roland windows in Chartres' ambulatory, whose outline was taken from a crusader window of Suger's abbey. The majority of Chartres' windows belong to the early XIII century, when the city was mistress of the vitrine art and supplied the cathedrals of Bourges, Rouen, Sens, Laon, Auxerre, Tours, Le Mans, Poitiers, and even Canterbury. In the nave's north aisle, the St. Eustace window (the third) is held to be of faultless artistry. The large lancets which light the aisles scintillate as with precious jewels. Only some five or six have floral scrolls filling the spaces between the medallions and the deep border that surrounds each window; in France a geometric pattern for such interstices was more frequent. At the base of each window is what is called its signature--a medallion which usually represents the avocation of the donors, whether kings, knights, priests, butchers, shoemakers, furriers, or water carriers. Thus below the Charlemagne-Roland windows tradesmen display rich fur mantles, and we know that the _pelletiers_ were the donors. Splendid were the gifts of the old artisan guilds. The tanners presented an apse-chapel window in honor of St. Thomas Becket, the vintners one that related the story of Noe, planter of vines. An overpowering sensation it must have been for those mediæval workmen to worship beneath the vaults they themselves had helped to build, under the windows they had contributed. Kings and knights were their fellow donors, but in the cathedrals of France the gifts of the lowly were the most plentiful, a Christian quality which endured till the XVI-century disunion. To Chartres St. Louis gave a window in honor of St. Denis, patron of his kingdom. The splendid red northern rose, "The Rose of France," is a glorification of Our Lady. The donjons of Castile adorn it in honor of the queen regent. Directly opposite is the big south rose presented by Blanche's enemy, Pierre Mauclerc, who tried to kidnap Louis IX from his mother, but who was to die fighting the infidels under his cousin the king, as did Pierre de Courtenay, another donor of a window at Chartres. Pierre de Dreux, it is said, began the porch before the southern entrance to commemorate his marriage with the heiress of Brittany, a granddaughter of Henry II, Plantagenet. Like every door of this church of the resplendent entranceways, it is a mass of sculpture. Mauclerc was grandson of the builder of St. Yved at Braine, and brother of Archbishop Henri de Dreux, who donated windows to his cathedral at Rheims. Below the Dreux rose at Chartres, four of the Prophets are borne on the shoulders of the four Evangelists, for never could those generations, enamored of symmetry, resist the opportunity to weave together the Old and New Testaments.