Willem J. Luyten, photographer2018-09-212018-09-21circa 1920http://172.16.52.76:80/cdm/ref/collection/coll8/id/153https://hdl.handle.net/20.500.12111/1153Albert Einstein at the Leiden (Netherlands) home of physicist and mathematician Paul Ehrenfest, with Ehrenfest's son, Pavlik (Paul), sitting on Einstein's lap.B&WPermission to use this image must be requested from the Institute's Archives. Please contact archives@ias.edu.Ehrenfest, Paul, 1880-1933Einstein, Albert, 1879-1955Image