In 1978 Messmer succeeded in acquiring large parts of the estate of the Swiss artist André Evard.
Throughout his life he painted figuratively and abstractly and was regarded as a pioneering painter of Swiss Modernism.
Through the artist, the entrepreneur found concrete-constructive art, which today forms the focus of his collection.
In addition, the International André Evard Art Award, founded by Messmer, was named to honor the artist.
In addition to the estate of André Evard, the Messmer art collection includes works by Max Bill, Georges Braque, Salvador Dalí, Otto Dix, Günter Fruhtrunk, François Morellet, A. R. Penck, Pablo Picasso, Gerd Grimm, Sonia Delaunay, Joan Miró and Victor Vasarely.