This is a list of the films that received the Palm d'Or (or the Grand Prix du Festival), according to the french Wikipedia: fr.wikipedia.org/wiki/Palme_d'or
But I later revised it according the official Festival site for it misses one of the three 1951 awarded films: www.festival-cannes.com/en/archives/1951/awardCompetition.html

- What would be the first edition of the Festival was cancelled in 1939. A retroactive Palme d'Or was awarded in 2002 by a special jury.
- First edition was celebrated in 1946, when eleven films were Awarded the Grand Prix.
- The second edition, held in 1947, awarded five films in categories: Musical Comedy (Ziegfeld Follies), Psychological and Love Film (Antoine et Antoinette), Animation Design (Dumbo), Social Film (Crossfire) and Adventure and Crime Film (Les Maudits).
- The Palme d'Or was in fact first awarded in 1955. Before that, and also from 1964 to 1974, the main prize was called the Grand Prix.
- From 1967 on, another award called Grand Prix was stabilished but it's not connected to the original or to the Palme d'Or.
- Three movies were given the Grand Prix (ex-aequo) in the fourth edition of the Festival (1951), two in the fifth (1952) and two in the nineteenth (1966).
- Two films received the Palme d'Or Ex-aequo in 1973, 1979, 1980, 1993 and in 1997.
- Also two films were awarded Unanimous Palme d'Or Ex-aequo in 1961, 1972 and in 1982.
- The 21st edition (1968) was cancelled due to the events of "May 68" in France.