Friedrich Schröder-Sonnenstern: The Surrealist Prophet of Kaliningrad Friedrich Schröder-Sonnenstern (born Friedrich Schröder; September 11, 1892 – May 10, 1982) was a German artist and painter who stands as one of the most compelling figures in Art Brut—a movement championing raw, untamed artistic expression outside the mainstream conventions of academic art. Born in Sovetsk (now Kaliningrad Oblast), Russia, Schröder-Sonnenstern’s li…