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| Location | Longchamp Racecourse |
|---|---|
| Date | October 7, 1973 |
| Winning horse | Rheingold |
The 1973 Prix de l'Arc de Triomphe was a horse race held at Longchamp on Sunday 7 October 1973. It was the 52nd running of the Prix de l'Arc de Triomphe.
The winner was Henry Zeisel's Rheingold, an Irish-bred four-year-old colt trained in England by Barry Hills and ridden by Lester Piggott. Rheingold's owner, trainer and jockey were winning the race for the first time. Piggott went on to win two more Arcs on Alleged in 1977 and 1978.
Rheingold was the fifth British-trained horse to win the race after Comrade, Parth, Migoli and Mill Reef.