Where did LHOOQ first go on display?

LHOOQ, the famous artwork by Marcel Duchamp, first went on display in 1919 at the Galerie 291 in New York City. The piece is a modified postcard of The Mona Lisa, featuring a mustache and goatee added by Duchamp. This provocative work challenged traditional notions of art and authorship, contributing significantly to the Dada movement.