By chance i found a publication by atelier de Herenplaats. An artist studio for the mentally deficient and i was really surprised to find some great art within this publiucation. This Art Brut/Outsider Art is matured and must be considered as true art. The spontanious compositions delight and i have read on the site of de Herenplaats that many of their artist have had their ( international) presentations in galeries and museums.
de Herenplaats site can be found on this address: http://www.herenplaats.nl
and www.ftn-books.com has the Herenplaats publication now for sale in its shop.