When was les trois sphinx de bikini painted by Dali?

1947 is the year in which Les Trois Sphinx de Bikini(Three Sphinxes of Bikini) was painted. The painting in question -- which reveals a human head, a mushroom cloud, and a tree -- refers to the beginning of nuclear-testing by the United States of America at the Micronesian atoll of Bikini in 1946. The testing in question took 11 more years to complete a total of 23 tests in an area inhabited by 200 Micronesians.