Bill Traylor, Blue Cat, 1939-1942. In only three years, between 1939 and 1942, Bill Traylor—former slave, factory worker, and homeless welfare recipient, who slept on a wooden pallet inside the [Ross-Clayton Funeral Parlor in Montgomery, Alabama]—created his own extraordinary history of drawing in 1,800 images. Most were preserved by his friend and fellow artist, Charles Shannon.
Hans Prinzhorn (1886-1933), who as an art historian and doctor who collected works from his patients at the Psychiatric University Hospital in Heidelberg. This cumulated into the “Prinzhorn Collection”, a world renowned art collection that inspired artists like Alfred Kubin, Paul Klee, Max Ernst and Pablo Picasso. Shown at the exhibition “Inner Worlds Outside” at Whitechapel Gallery, London in 2006.
"Throughout Jean Dubuffet's life, he collected "Outsider Art" i.e., Art by mentally deranged people, vagabonds, street urchins, and prisoners. He found inspiration in the seemingly asymmetric scrawling and the scratching of this kind of unintentional Graffiti and sought to convey that madness in his own Oil and Impasto Works. Most of his works appear as primitive and doodling that is almost too basic...[like] a kindergarten kid."