The more than 15,000 art works that they amassed since the 1940s (from antiquities to contemporary art) are now housed in The Menil Collection that Dominique opened in 1987 after the passing of her husband. The building itself is a modern architectural landmark by Italian architect (and one of my favourites) Renzo Piano. It seamlessly combines an institutional setting for viewing artwork with the domestic scale that Dominique desired.
The de Menils associated themselves with many of the great artists of the Modern era (Man Ray, Marcel Duchamp, Jasper Johns, Mark Rothko), including these three artists who rendered Dominique de Menil in portraits:
Andy Warhol, 1969
Max Ernst, 1934
Alexander Calder, 1964