The Fagus shoe factory in Alfeld (near Hanover), designed in 1911 by Walter Gropius and Adolf Meyer, is one of the classic examples of modern industrial architecture. It was declared a UNESCO world heritage site in 2011.
Das Fagus-Werk in Alfeld, colour photograph, 2007, photographer: Carsten Janssen; source: Wikimedia Commons, Creative Commons Attribution-ShareAlike 2.0 Germany.