Ai Weiwei (born 1957) Bombs , 2019 Offset lithograph on wove paper, with printed signature and numbered 34/500 (there were also 50 artist's proofs) on the accompanying certificate of authenticity, co-published by the artist and the Mildred Lane Kemper Art Museum, St. Louis, the full sheet. sheet 72 x 48in (182.9 x 121.9cm)