Reichenau, Baden-Württemberg  Reichenau is a municipality in the district of Konstanz in Baden-Württemberg in Germany. It is located partly on Reichenau Island with its famous abbey and on the northern shore of the "Untersee" section of Lake Constance. The island has historically been the center of the community. The administrative seat of the municipality is in the village of "Mittelzell". A causeway built in 1838 connects the isle with the mainland. The municipality consists of the settlements "Niederzell", "Mittelzell" und "Oberzell" on the island as well as "Lindenbühl" and "Waldsiedlung" on the shore. The municipality encompasses the estates of the former Reichenau Abbey, which was secularized in 1757. Today Reichenau is characterized by the market gardening of fruits and vegetables and also known for its psychiatric hospital, established in 1913, a teaching hospital of the University of Konstanz. Reichenau can be reached via the Bundesstraße 33 running from the Bundesautobahn 81 to Konstanz. It has also a railway station on the Upper Rhine Railway ("Hochrheinbahn") connecting Basel and Konstanz.