An undated drawing (early 1900s) by Louis Umgelter, scanned from the book La Beautee Insensee on the Prinzhorn Collection at University of Heidelberg, published by Palais Des Beaux-Arts De Charleroi, 1995. Hans Prinzhorn was a German psychiatrist and art historian, and an assistant at the Psychiatric Institute at the clinic of University of Heidelberg where he collected art by mentally ill patients.

An undated drawing (early 1900s) by Louis Umgelter, scanned from the book La Beautee Insensee on the Prinzhorn Collection at University of Heidelberg, published by Palais Des Beaux-Arts De Charleroi, 1995. Hans Prinzhorn was a German psychiatrist and art historian, and an assistant at the Psychiatric Institute at the clinic of University of Heidelberg where he collected art by mentally ill patients.