Founded in 1147, the Cistercian Maulbronn Monastery is considered the most complete and best-preserved medieval monastic complex north of the Alps. Surrounded by fortified walls, the main buildings were constructed between the 12th and 16th centuries. The monastery's church, mainly in Transitional Gothic style, had a major influence in the spread of Gothic architecture over much of northern and central Europe. The water-management system at Maulbronn, with its elaborate network of drains, irrigation canals and reservoirs, is of exceptional interest.
The island of Reichenau on Lake Constance preserves the traces of the Benedictine monastery, founded in 724, which exercised remarkable spiritual, intellectual and artistic influence. The churches of St Mary and Marcus, St Peter and St Paul, and St George, mainly built between the 9th and 11th centuries, provide a panorama of early medieval monastic architecture in central Europe. Their wall paintings bear witness to impressive artistic activity.