Built between 1827 and 1829, this building was originally the headquarters of the Cotton Exchange and the Chamber of Commerce and Industry. It houses the Société Industrielle de Mulhouse, created in 1826 by young industrial philanthropists from the Mulhouse Masonic lodge. Still in operation, SIM is a think tank, made up of specialised committees (chemistry, mechanics, fine arts, public utility, etc.) which is at the origin of many economic, social and technical advances.