Willem De Looper (American b. 1932), Maroon Triangle, acrylic on paper, 49-1/2 x 38 in

Willem De Looper (American b. 1932), Purple Center XII, acrylic on paper, 39-3/4 x 30 in

Willem De Looper (American b. 1932), Untitled (Gray and Tan Abstract): A Diptych, acrylic on paper, 40 x 30 in

Willem De Looper (American b. 1932), Big Pink, acrylic on paper, 37-3/4 x 49 in

Willem De Looper (American b. 1932), Blue Abstraction with Curved Black Center, acrylic on paper, 40 x 30 in

Willem De Looper (American b. 1932), '20 III' (Blue and Gold Abstract)

Willem De Looper (American b. 1932), Blue Gray Stripe

Willem deLooper, Dutch/American, 1932-2009, Self Portrait, two pen and inks with watercolor in one frame, each drawing 5 x 8 in.