Ulrich Rückriem is a German sculptor notable for his monumental stone sculptures. He lives and works in Cologne and London. His abstract works of art are often assigned to the style of minimalism and process art.
Wikipedia https://en.wikipedia.org/wiki/Ulrich_Rückriem
Official Website http://www.kunst-am-moltkeplatz.de/
Address 1 Moltkeplatz, Essen 45138, Germany
Coordinates 51°26'49.829" N 7°1'23.605" E
