The museum´s collection is based on the works of the collection of Marianne and Fritz Keller. It comprises almost the complete early works by San Keller (Stefan Keller) dating from the years 1982 – 1995, as well as central works from all other phases of the artist’s creative development.

The museum´s collection is complemented by loans from museums as well as private lenders. Acquisition of additional works for the collection is actively pursued. At the moment it is the early action object Be San Keller`s Standard Bearer as well as the objects Moneycover (2003) and You and I (2007) that are on permanent loan to the museum and on show to the public.