Dr Ernst Weiss (German: Weiß, August 28, 1884 – June 15, 1940) was a German-speaking Austrian physician and author of Jewish descent.

Ernst Weiss was born in Brünn, Moravia, Austro-Hungarian Empire (now Brno in the Czech Republic) to the family of a prosperous Jewish cloth merchant.

[2] Weiss's last novel, The Eyewitness, written in 1938, describes a young German veteran of World War I, identified as "A.H.," who has been sent to a military hospital because he is suffering from hysterical blindness (now termed conversion disorder).

The character is evidently modeled on Adolf Hitler, who was indeed treated for conversion disorder at a military hospital in Pasewalk, but scholars dispute to what extent the account is fictional.

The whereabouts of the file today are unknown, however, and the real Edmund Forster disapproved of hypnosis, the treatment used to cure "A.H." in Weiss's novel.

[1][9][10] His attempt to deal with poison in his hotel room did not succeed immediately, but he died as a result only in the following night in a Paris hospital.