Four architects ? Beno Aeschlimann, Stefan Hess, Reto Mosimann and since 2012 Hanspeter Stauffer ? are responsible for the office Spaceshop in Biel. Since 1998, it has produced an impressive series of exciting buildings and renovations. They include the extension to the Sonnenhof primary school in Bern, which sensitively reinterprets the repertoire of the ?Solothurn School?.