In Donaueschingen, Germany, the business and art-collector couple Margit und Lutz Biedermann commissioned the rehabilitation of a classicistic museum building on the River Brigach in southwest Germany and extend-
ed it by adding a monolithic annex consisting of lightweight concrete colored black with Liapor and featuring an architec-
tural concrete finish. They created a composition of old and new that captivates the viewer through its shape, material, and monolithic construction.
The classicistic museum build-
ing was built in 1841 by the Do-naueschingen Museum Society. A...