The G1 Prix de l'Arc de Triomphe is a prestigious horse race held annually in France. It takes place at the Longchamp Racecourse in Paris, typically on the first Sunday of October. This race is open to thoroughbred horses aged three years and older and is considered one of the most important events in the horse racing calendar. Established in 1920, the Arc is a part of the European Pattern Race series and is classified as a Group 1 race, the highest level of horse racing. The race covers a distance of 2,400 meters (approximately 1.5 miles) and attracts top horses, trainers, and jockeys from around the world.