Psychopathography of Adolf Hitler is an umbrella term for psychiatric (pathographic, psychobiographic) literature that deals with the hypothesis that Adolf Hitler, the leader of Nazi Germany, was mentally ill, although Hitler was never diagnosed with any mental illnesses during his lifetime. Hitler has often been associated with mental disorders such as bipolar disorder, schizophrenia, and psychopathy, both during his lifetime and after his death. Psychiatrists and psychoanalysts who have diagnosed Hitler as having mental disturbance include well-known figures such as Walter C. Langer and Erich Fromm. Other researchers, such as Fritz Redlich, have concluded that Hitler probably did not have these disorders.