Art Information Center The Place for Answers to any Art Question Guru Rinpoche (detail) . silk thangka. ca.1904. Private collection, USA. Ex. coll.: Empress Dowager of China. Bib.: THE SPIRIT OF ASIA:ASIAN ART, World Art Press, 1996; no.31. Litho #1 (Waves #1) . lithograph. 1960. Private collection, USA. Bib.: Lanier Graham, THE PRINTS OF WILLEM DE KOONING: A CATALOGUE RAISONNE, Lebon, 1991; vol.