This art exhibition house of the Langen Foundation opened in September 2004. The Foundation owes its existence to a wholly private initiative. The founder, Marianne Langen, achieved with the construction of this building the fulfilment of a dream. Together with her husband, Viktor Langen, she had begun to collect art works in the 1950s. Harmoniously embedded in the landscape, the Langen Foundation presents itself as a complex of fair-faced concrete, glass and steel surrounded by earthworks. Through a broad concrete arch, the way leads along cherry trees and past an artificial pond to two joined complexes of buildings which differ from each other architecturally: a long concrete structure surrounded by a mantle of glass and, at an angle of 45 degrees, two concrete bars built parallel to one another. These latter two buildings are buried six metres deep in the earth and protrude only 3.45 metres above it. The 8 metres room height can only be experienced from within the building.