Kazimir Severinovich Malevich (23 February [O.S. 11 February] 1879 – 15 May 1935) was a Russian avant-garde artist and art theorist, whose pioneering work and writing influenced the development of abstract art in the 20th century. His concept of Suprematism sought to develop a form of expression that moved as far as possible from the world of natural forms (objectivity) and subject matter in order to access "the supremacy of pure feeling" and spirituality. Born in Kiev, modern-day Ukraine, to an ethnic Polish family, Malevich was active primarily in Russia and became a leading artist of the Russian avant-garde. His work has been also associated with the Ukrainian avant-garde, and he is a central figure in the history of modern art in Central and Eastern Europe more broadly.
Early in his career, Malevich worked in multiple styles, assimilating Impressionism, Symbolism, Fauvism, and Cubism through reproductions and the works acquired by contemporary Russian collectors. In the early 1910s, he collaborated with other avant-garde Russian artists, including Mikhail Larionov and Natalia Goncharova. After World War I, Malevich gradually simplified his approach, producing key works of pure geometric forms on minimal grounds. His abstract painting Black Square (1915) marked the most radically non-representational painting yet exhibited and drew "an uncrossable line (…) between old art and new art". Malevich also articulated his theories in texts such as From Cubism and Futurism to Suprematism (1915) and The Non-Objective World (1926).