Clara Rockmore (born Clara Reisenberg, Vilnius, Lithuania, March 9, 1911; d. New York City, May 10, 1998) is generally considered to be the greatest player of the theremin electronic musical instrument since its invention and was without peer in the early decades of its use. While many listeners familiar with the theremin have heard it used mostly as a spooky special-effects device, Rockmore, a classically-trained musician, used it to perform classical works.