August Natterer (3 August 1868 – 7 October 1933), also known as Neter, was a German artist with schizophrenia. Because he suffered form delusions and hallucinations, he was put in a psychiatric hospital in 1907. There, he started to paint. His paintings are mostly about his hallucinations, and delusions. The style of painting is known as Outsider art, or Art brut today.