Sir Philip Albert Gustave David Sassoon, 3rd Baronet, (4 December 1888 – 3 June 1939) was a British politician, art collector, and socialite, entertaining many celebrity guests at his homes, Port Lympne Mansion, Kent, and Trent Park, North London. He served as a staff officer during the First World War, from July 1914 to November 1918. Family Sassoon was a member of the prominent Jewish Sassoon family and Rothschild family. He was born in his mother's mansion on Avenue de Marigny, Paris. His father was Sir Edward Albert Sassoon, 2nd Baronet, MP, son of Albert Abdullah David Sassoon; his mother was Aline Caroline, daughter of Gustave Samuel de Rothschild. His sister was Sybil Sassoon, who married the Marquess of Cholmondeley. He was a cousin of the war poet Siegfried Sassoon. He was descended from the banking family of Frankfurt. When aged only nineteen years old his great-grandfather, James Rothschild was sent to Paris to set up the family business in France. James became wealthy. When he died in 1868 he was buried in Père Lachaise Cemetery. His branch of the Sassoon-Rothschild family kept the Jewish faith, donated to Jewish charities and founded synagogues. His great-grandfather David Sassoon had been imprisoned in Baghdad in 1828, and in 1832 he established his business David Sassoon & Co. at Bombay. He took advantage of British rule to return to Baghdad to trade. The family eventually established a Head Office at 12, Leadenhall Street, London and a company branch in Manchester. The Sassoons became assimilated Jews, dressing, acting and thinking like Englishmen. The Sassoon Brothers, David and Albert were friends of the Prince of Wales, built the 'Black Horse' brand. The business came with a baronetcy of Kensington Gore. His father bought Shorncliffe Lodge, in Sandgate Kent, where his cousin Mayer Rothschild was the MP. His father was not a successful backbencher, but the political influences had a profound effect on young Philip. He was educated at Farnborough Prep school and Eton before going up to Oxford. Old Etonian Arthur Balfour recommended the Debating Society to him. His father was also friendly with Frances Horner, wife of Sir John Horner, a longtime friend of Gladstone who lived at Mells Manor in Somerset. His house master was a member of the secret society of liberals, the Young Apostles. Also a near contemporary was Osbert Sitwell, the Yorkshireman and author. A French scholar, he learned the