Matt Lamont on Twitter: "Karl-Heinz Adler was a German abstract painter, graphic artist and conceptual artist and has been described as "one of Germany’s foremost representatives of Concrete Art." Images via https://t.co/z3kZabyGtc https://t.co/UECrSTRGIq" / Twitter

Karl-Heinz Adler was a German abstract painter, graphic artist and conceptual artist and has been described as "one of Germany’s foremost representatives of Concrete Art." Images via artnet.com/artists/karl-h