Ernst Gräfenberg Ernst Gräfenberg Ernst Gräfenberg (September 26, 1881 in Adelebsen near Göttingen, Germany – 28 October 1957 in New York City, United States) was a German-born physician (medical doctor) and scientist. He is known for developing the intrauterine device (IUD), and for his studies of the role of the woman's urethra in orgasm. The G-spot is named after him. Gräfenberg studied medicine in Göttingen and Munich, earning his doctorate on 10 March 1905. He began working as a doctor of ophthalmology at the university of Würzburg, but then moved to the Department of Obstetrics and Gynaecology at the University of Kiel,
Ernst Thälmann I promise to learn to work and fight [struggle] as Ernst Thälmann teaches". In the 1950s, an East German film in two parts, "Ernst Thälmann", was produced. In 1972, Cuba named a small island, Cayo Ernesto Thaelmann, after him. In Ho Chi Minh City, the secondary school THPT Ernst Thalmann (Ten Lơ Man) was named after him. The British Communist composer and activist Cornelius Cardew named his "Thälmann Variations" for piano in Thälmann's memory. The East German weapons factory was named after Thälmann, the VEB Ernst Thälmann Waffenfabrik. Ernst Thälmann Ernst Thälmann (16 April 1886 – 18 August 1944) was