Who dated Mercedes de Acosta?

Mercedes de Acosta (March 1, 1892 – May 9, 1968) was an American poet, playwright, and novelist. Although she failed to achieve artistic and professional distinction, de Acosta is known for her many lesbian affairs with celebrated Broadway and Hollywood personalities including Alla Nazimova, Isadora Duncan, Eva Le Gallienne, and Marlene Dietrich. Her best-known involvement was with Greta Garbo with whom, in 1931, she began a sporadic and volatile romance. Her 1960 memoir, Here Lies the Heart, is considered part of gay history insofar that it hints at the lesbian element in some of her relationships.

Angela Isadora Duncan (May 26, 1877, or May 27, 1878 – September 14, 1927) was an American-born dancer and choreographer, who was a pioneer of modern contemporary dance and performed to great acclaim throughout Europe and the United States. Born and raised in California, she lived and danced in Western Europe, the U.S., and Soviet Russia from the age of 22. She died when her scarf became entangled in the wheel and axle of the car in which she was travelling in Nice, France.

Claire de Forbin La Barben (née Charles-Roux; 10 April 1908 – 1992) fought with the French Resistance during World War II. Married to the last marquess of Forbin-la Barben, she was the lover of Isabel Pell and Mercedes de Acosta.

Marie Magdalene "Marlene" Dietrich (, German: [maʁˈleːnə ˈdiːtʁɪç] ; 27 December 1901 – 6 May 1992) was a German-American actress and singer whose career spanned nearly seven decades. In 1920s Berlin, she performed on the stage and in silent films. Her performance as Lola Lola in Josef von Sternberg's The Blue Angel (1930) brought her international acclaim and a contract with Paramount Pictures. Dietrich starred in many Hollywood films, including six roles directed by Sternberg: Morocco (1930) (her only Academy Award nomination), Dishonored (1931), Shanghai Express and Blonde Venus (both 1932), The Scarlet Empress (1934), The Devil Is a Woman (1935). Throughout World War II, she was a high-profile entertainer in the United States. Although she delivered notable performances in several post-war films, including Billy Wilder's A Foreign Affair (1948), Alfred Hitchcock's Stage Fright (1950), Billy Wilder's Witness for the Prosecution (1957), Orson Welles's Touch of Evil (1958), and Stanley Kramer's Judgment at Nuremberg (1961), she spent most of the 1950s to the 1970s touring the world as a marquee live-show performer.

Dietrich was known for her humanitarian efforts during World War II, housing German and French exiles, providing financial support and advocating their American citizenship. For her work on improving morale on the front lines during the war, she received various honors from the United States, France, Belgium, and Israel. In 1999, the American Film Institute named Dietrich the ninth greatest female screen legend of classic Hollywood cinema.