It houses a collection of modern art based on two main artists: Paul Klee and Pablo Picasso.

[1][2] The art dealer Siegfried Rosengart[3] (1894-1985), who worked in Munich with his uncle Heinrich Thannhauser before moving to Lucerne, had contacts with Picasso[4] and Marc Chagall.

[5] With his daughter, Angela, he built a modern art collection containing works by Vassily Kandinsky,[6] Georges Braque, Chaïm Soutine, Amedeo Modigliani, Fernand Léger, Georges Seurat, Pierre Bonnard, Édouard Vuillard, Paul Cézanne ou Claude Monet,[7] as well as Camille Pissarro, Auguste Renoir, Maurice Utrillo, Georges Rouault, Henri Matisse ou encore Joan Miró.

[5][9] The Rosengart Collection opened in March 2002 and received more than 100,000 visitors in the following twelve months.

[11] The former bank's conference room is preserved in its original state and open to visitors.