In addition to the estate of André Evard, the collection Messmer includes figurative and abstract works of classic modernism and contemporary art. The collection focuses on abstract geometry. There ist no permanent exhibtion of the collection.

Selected positions of the collection: concrete and constructive art

Cesar Andrade, Bernard Aubertin, Gerald Baschek, Werner Bauer, Max Bill, Jakob Bill, Gerhard Birkhofer,  Hellmut Bruch, Giancarlo Caporicci, Alain Clément, Ivan Contreras-BrunetCarlos Cruz-DiezDadamaino, Jo Delahaut, Sonia Delaunay, Raoul Dufy, Jaap Egmond, Manfred Emmenegger-Kanzler, Klemens Etz, André Evard, Lucio Fontana, Gunter Frenzel, Otto Freundlich, Gerhard Frömel, Günter Fruhtrunk, Ueli Gantner, Friedrich Geiler, Walter Giers, Hans Jörg Glattfelder, Eugenia Gortschakowa, Camille Graeser, Roland Helmer, Gisela Hoffmann, Michel Jouet, James Juszczyk, Joachim Kaiser,  Jean Leppien, Bernhard Licini, Josef Linschinger, Heinz MackAlberto Magnelli, Bernhard Malin, François Morellet, Bruno Munari, Ben Muthofer, Knut Navrot, Jo Niemeyer, Laszlo Otto, Benno Oertli,  Dario Pérez-Flores, Georg Karl Pfahler, Bridget Riley, Sigurd Rompza, Christian Rudolph, Maura Saddi, Turi Simeti, Felix Schlenker, Rolf Schneebeli, Peter Somm, Anton Stankowski, Klaus Staudt, Peter Stächelin, Günther Uecker, Victor Vasarely, Jean-Pierre Viot, Peter Vogel, Michael Wagner, Yvaral

Other positions of the collection Messmer (selection)

Georges Braques, Lucien Clerque, Salvador Dalí, Dare (Sigi von Koeding), Otto Dix, Gerd Grimm, Paul Klee, A.R. Penck, Pablo Picasso, Adriano Piu, Leopold Schmutzler