they were the first private collectors to buy work from local artists from limburg like ger lataster and aad de haas. in the 1950s and 1960s works of melle, armando, edgar fernhout and jan schoonhoven were added; the art of shinkichi tajiri, karel appel, gerrit benner, eugène brands, constant nieuwenhuys, guillaume cornelis van beverloo, jaap nanninga, lucebert, anton rooskens en theo wolvekamp stand out by the fact that these artworks represent early periods. the same can be said about rudi bierman, herbert fiedler en arie kater; bram bogart, wim de haan, anton heyboer en jaap wagemaker. later acquisitions of the cobra movement were made, as well as of informal art or material art. maarten van bommel died in 1991. his wife reina van dam, born in voorthuizen on 31 december 1910, died on 29 july 2008 at the age of 97.