Painter, draughtsman and teacher, born in Würzburg, Bavaria, Germany, who was a child prodigy, a well-known portrait painter by the age of 20. His drawing of the German chancellor Bismarck, done at 13, was presented to him. Studied in Munich and Rome and moved to London in 1896, teaching at the London School of Arts. By 1900 he was in New York but returned to London where he was married, before returning to Germany in 1908, where he immersed himself in the Berlin Secession and other contemporary art movements. By 1933 the Nazis had driven him back to England, where he took British nationality and spent most of his life apart from long periods in Canada, from 1949, where he died in Montreal. Oppenheimer was a frequent exhibitor at RA from 1905–53 and for long a member of RP.