Mark  Tobey   Trembling Space, 1961 Tempera on paper, 68.6 x 50.8 cm Solomon R. Guggenheim Foundation, Hannelore B. and Rudolph B. Schulhof Collection, bequest of Hannelore B. Schulhof, 2012 2012.96 © Mark Tobey, by SIAE 2012 credits: Hangar Design Group