The 13th century saw the introduction of a new kind of window, with grisaille, or white glass, with a geometric pattern, usually joined with medallions of stained glass. These windows allowed much more light into the cathedral, but diminished the vividness of the stained glass, since there was less contrast between the dark interior and bright exterior. The most remarkable and influential work of stained glass in the 13th century was the royal chapel, Sainte-Chapelle (1243–1248), where the windows of the upper chapel, high, occupied all of the walls on the three sides, with 1,134 individual scenes. Sainte-Chapelle became the model for other chapels across Europe.