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
In 1960 he painted his supplements on a hand painted copy of the 
Mona Lisa,... [DOC] [TLE] A History of Graphic Design: Chapter 45; Dadaism; The meeting ... [PAR] Dada's Visual Communication; After All Everyone Dances to His Own Personal 
Boomboom ....