Claim: Orson Welles was a performance artist.
Evidence: He is remembered for his innovative work in all three : in theatre , most notably Caesar -LRB- 1937 -RRB- , a Broadway adaptation of William Shakespeare 's Julius Caesar ; in radio , the legendary 1938 broadcast `` The War of the Worlds '' ; and in film , Citizen Kane -LRB- 1941 -RRB- , consistently ranked as one of the all-time greatest films.