The history of the North Rhine-Westphalia Art Collection began in 1960 when the state government acquired a collection of 88 works by the painter Paul Klee. The Klee collection is the foundation of the "Foundation Kunstsammlung Nordrhein-Westfalen" founded by the state of North Rhine-Westphalia in 1961.
https://www.duesseldorf-tourismus.de/sehenswuerdigkeiten/architektur/kunstsammlung-nordrhein-westfalen-k20-grabbeplatz/