Robuta

https://www.christies.com/zh-cn/lot/lot-6424099 ROY LICHTENSTEIN (1923-1997), Sky and Water | Christie's sky and water roy lichtenstein 1923 1997 christie https://www.nfb.ca/film/mc_escher_sky_and_water_1/embed/player/ M.C. Escher: Sky and Water 1 m c escher sky and water 1