Altötting (ält-öttĭng) [key], town (1994 pop. 12,060), Upper Bavaria, Bavaria, S Germany, near the Inn River and the Austrian border, 42 mi (68 km) SW of Passau. The town is a Roman Catholic pilgrimage center. The Chapel of Mercy (or Chapel of Grace) dates to A.D. 700 and contains a medieval wooden statue of the Virgin Mary, known as the Black Madonna because it has become discolored by candle smoke. The late Romanesque church there contains the tomb of Count Tilly.