Auch Cathedral of Sainte-Marie (1489–1662) is one of the finest Gothic buildings of southern France. Its chief features are 113 Renaissance choir stalls of carved oak and Renaissance stained-glass windows by Arnaud de Moles. The cathedral’s classical facade dates from the 16th and 17th centuries, and its great organ (17th century) is one of the finest in the world for playing Baroque music. The 18th-century archbishop’s palace, with a 14th-century tower, adjoins the cathedral. Nearby are a museum of art and archaeology and a museum containing the historical archives of the département of Gers, together with a large library and a collection of manuscripts. The prefecture, adjoining the cathedral, was once the palace of the archbishops of Auch.
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