He was known for his readymades such as "L.H.O.O.Q.", a copy of the "Mona Lisa" with a penciled-in mustache & beard
Right; Francis Picabia, L.H.O.O.Q, reproduction for 391, 1920 ... 
of da Vinci's Mona Lisa onto which he drew a moustache and goatee in pencil 
and... [DOC] [TLE] Duchamp at The Turn of the Centuries | Toutfait [PAR] Dec 1, 2000 ...