Unlike newer collections of psychotic art, the Prinzhorn Collection does not consist of results from external occupational therapy and psychotherapy stimulation, but rather entirely spontaneously created artworks. After studying art history and earning his doctorate, Hans Prinzhorn studied medicine and dedicated himself to psychiatry. After the war in 1918, he became an assistant at the Heidelberg Psychiatric Clinic. The director there, Karl Wilmanns, asked him to expand and scientifically process a collection of artistic products created by the mentally ill that Wilmanns had already begun. The art objects that Prinzhorn collected and processed in Heidelberg predominantly come from untrained artists who were driven to creative activity only after the onset of a mental illness—most of whom suffered from schizophrenia.