Alexandre Louis Philippe Marie Berthier (July 20, 1883, Paris - May 30, 1918, Barenton-sur-Serre; 4th Prince de Wagram) was the son of Bertha Clara von Rothschild of the German branch of the prominent Rothschild family and Louis Philippe Marie Alexandre Berthier, 3rd Prince de Wagram (1836–1911). The family resided in the ancestral home, the Château de Grosbois, a large estate in Boissy-Saint-Léger, southeast of Paris. Alexandre Berthier was an active collector of impressionist paintings and owned works by Gustave Courbet, Édouard Manet, Claude Monet, and Pierre-Auguste Renoir.