Walter Felsenstein (30 May 1901 – 8 October 1975) was an Austrian theater and opera director.He was one of the most important exponents of textual accuracy, productions in which dramatic and musical values were exquisitely researched and balanced. His most famous students were Götz Friedrich and Harry Kupfer both of whom went on to have important careers developing Felsenstein's work. Opera director Siegfried Schoenbohm was one of his assistants.