Prix du Jockey Club initially 2,500 metres, and this was cut to 2,400 metres in 1843. It was switched to Versailles during the Revolution of 1848, and it was cancelled due to the Franco-Prussian War in 1871. The race was abandoned in 1915, and for three years thereafter it was replaced by the Prix des Trois Ans. This took place at Moulins in 1916, Chantilly in 1917 and Maisons-Laffitte in 1918. The first two runnings after World War I were held at Longchamp. A substitute race called the Prix de Chantilly was run at Auteuil over 2,600 metres in 1940. The Prix du Jockey
Jockey Club Jockey Club Racecourses was formerly called Racecourse Holdings Trust. The fifteen racecourses owned by Jockey Club Racecourses are: Large courses: Smaller courses: Jockey Club The Jockey Club is the largest commercial horse racing organisation in the United Kingdom. No longer responsible for the governance and regulation of British horseracing, today it owns 15 of Britain's famous racecourses, including Aintree, Cheltenham, Epsom Downs and both the Rowley Mile and July Course in Newmarket, amongst other concerns such as the National Stud, and the property and land management company, Jockey Club Estates. The registered charity Racing Welfare is also a company limited