View of Paul-Klee-Platz (Paul Klee Square), inner courtyard of the K20 exhibition venue, part of the Kunstsammlung Nordrhein-Westfalen, the art collection of the German Federal State of North Rhine-Westphalia, Dusseldorf, North Rhine Westphalia, Germany, Europe

View of Paul-Klee-Platz (Paul Klee Square), inner courtyard of the K20 exhibition venue, part of the Kunstsammlung Nordrhein-Westfalen, the art collection of the German Federal State of North Rhine-Westphalia, Dusseldorf, North Rhine Westphalia, Germany, Europe

Detail of Paul-Klee-Platz (Paul Klee Square), inner courtyard of the K20 exhibition venue, part of the Kunstsammlung Nordrhein-Westfalen, the art collection of the German Federal State of North Rhine-Westphalia, Dusseldorf, North Rhine Westphalia, Germany, Europe

Cityscape of Dusseldorf, from the Kunstsammlung Nordrhein-Westfalen, the art collection of the German Federal State of North Rhine-Westphalia, Dusseldorf, North Rhine Westphalia, Germany, Europe

Cityscape of Dusseldorf, from the Kunstsammlung Nordrhein-Westfalen, the art collection of the German Federal State of North Rhine-Westphalia, Dusseldorf, North Rhine Westphalia, Germany, Europe

Geometric mosaic made of tiles by Sara Morris, Paul-Klee-Platz square, Kunstsammlung Nordrhein-Westfalen arts collection, K20 building, Duesseldorf, North Rhine-Westphalia, Germany, Europe

Your natural yellow daylight, installation art by Olafur Eliasson, Kunstsammlung Nordrhein-Westfalen arts collection, K20 building, Duesseldorf, North Rhine-Westphalia, Germany, Europe

Geometric mosaic made of tiles by Sara Morris, Paul-Klee-Platz square, Kunstsammlung Nordrhein-Westfalen arts collection, K20 building, Duesseldorf, North Rhine-Westphalia, Germany, Europe

Kunstsammlung Nordrhein-Westfalen arts collection, K20 building, poster of the Beuys exhibition, Duesseldorf, North Rhine-Westphalia, Germany, Europe

Geometric mosaic made of tiles by Sara Morris, Paul-Klee-Platz square, Kunstsammlung Nordrhein-Westfalen arts collection, K20 building, Duesseldorf, North Rhine-Westphalia, Germany, Europe

Kunstsammlung Nordrhein-Westfalen arts collection, entrance area, back-lit art, K20 building, K21 building, Schmela-Haus building, Duesseldorf, North Rhine-Westphalia, Germany, Europe

Truck tyre tubes as cloud ceiling, spatial installlation by Michael Sailstorfer, Kunstsammlung Nordrhein-Westfalen, arts collection of North Rhine-Westphalia, K 20, reopening in 2010, Duesseldorf, North Rhine-Westphalia, Germany, Europe

Paul-Klee-Platz square, illuminated stone bench, Kunstsammlung Nordrhein-Westfalen arts collection, K20 building, Duesseldorf, North Rhine-Westphalia, Germany, Europe

Kunstsammlung Nordrhein-Westfalen, arts collection of North Rhine-Westphalia, K 20, reopening in 2010, Duesseldorf, North Rhine-Westphalia, Germany, Europe