Piet Mondrian (Mondriaan in Dutch) and Bart van der Leck met during the First World War in the Dutch village of Laren. The artists shared a strong conviction that the world needed a new kind of art. Mondrian liked Van der Leck’s ideas about the use of the colours red, yellow and blue . Van der Leck was impressed by Mondrian’s search for abstraction. The exhibition examines the exact nature and lasting influence of the relationship between Mondrian and Van der Leck. Referring to paintings, photographs, letters and other archival materials. The museum has the world’s largest Mondrian collection and one of the largest De Stijl-collections, an art movement in which Mondrian played an active role for several years.