The Chapelle des Cordeliers dates to the 13th century and was once part of a Franciscan friary. The chapel itself is a modest Gothic structure, but it was transformed in 1976 when Marc Chagall installed his monumental stained-glass window "La Paix" (Peace) — 12 metres wide and 10 metres high, occupying the entire west wall. Working in his signature deep blues and purples, Chagall created one of the largest stained-glass compositions of his career, depicting themes of peace, love, and the reconciliation of peoples through a flowing tableau of figures, animals, and biblical scenes.
The window is best experienced in the morning when the light comes through from the west-facing façade. An audio guide (included in admission) provides context in several languages. The Parcours Chagall continues to the adjacent Musée du Pays de Sarrebourg, where a preparatory tapestry for a related Chagall work at the United Nations is on display. The chapel is at 28 rue du Musée; opening hours vary by season.