First opened as a museum in 1997, the castle initially displayed the van der Grinten collection in a cluttered manner recalling the brothers' own home.

WSJ: Touring Beuys-World in Germany's Lower Rhine

Beuys's distinctive use of industrial objects took shape in his Kurhaus years, but some of his earliest artistic traces can be found in Schloss Moyland ( moyland.de), a neo-Gothic castle outside Kleve housing the art collection of the van der Grinten brothers, two early supporters.

WSJ: Touring Beuys-World in Germany's Lower Rhine