One of the largest pipe displays, certainly in a modern organ. Organ in the Dom Altenberg, in North Rhine-Westphalia, Germany. Formerly a Cistercian monastery and now an interdenominational church shared by Catholic and Protestant congregations. The organ was built originally in 1980 by Klais Orgelbau of Bonn, and rebuilt in 2007. It has 4 manuals and has 6,300 pipes.