Lenka Vítková, Refrain, 2014. On view at SVIT, Prague through April 19.

Alfredo Pirri, Arie, 2014, feathers on sheets of colored plexiglass with hand painted acrylic, 208 X 108 CM. On view at Giacomo Guidi Arte Contemporanea, Milan through May 10.

Pablo Palazuelo, No title; series: Cristalografía, 1985, pencil and gouache on paper, 42 X 34,2 CM. On view at Galería Cayón, Madrid from March 26, indefinitely. 

Kenneth Noland, Comet, 1983, acrylic on canvas, 85" by 69 5/8". On view at Pace Gallery, New York through April 19.