Louis Jean, duc Decazes

Louis Jean Victor Sévère Decazes de Glücksbierg, 4th Duc Decazes and 4th Hertig af Glücksbierg (French pronunciation: [lwi dəkaz]; February 24, 1889 – June 2, 1941), was a French businessman and Thoroughbred racehorse owner and breeder.

He acquired more land surrounding his property and spent a great deal of money modernizing the facilities.

In 1918 he purchased Prince Palatine from the South African breeder Jack Barnato Joel.

In 1923, Louis Jean Decazes horse L'Yser won the Grand Steeple-Chase de Paris.

Duke Decazes died on June 2, 1941, in Lausanne, Switzerland where he had lived since 1936.