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.