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 Rudolf Vogenauer American Bavarian painter also named Peter Kraemer and Carl Johann Rabus (1898–1983), a German expressionist painter. Carl Rabus made a self-portrait with Vogenauer (circa 1927 to 1937) titled: "Zwei Freunde, Selbst mit Ernst Vogenauer" ("Two friends, Ernst Vogenauer and I"). Today this oil painting is in the private collection of Gerhard Schneider. After World War II, Vogenauer became an art teacher in the High Art School of Berlin-Weissensee, in East Germany. Ernst Rudolf Vogenauer was involved with German expressionism and participated in different international events such as the "First exhibition of modern art" in Bucharest. From 1946 to 1962 he