Gustav Klimt was an Austrian painter and illustrator in the late 19th and early 20th centuries. He was one of the leading figures of the Vienna Secession movement, noted for his highly stylized and decorative paintings featuring gold leaf and geometric or naturalistic forms. Some of Klimt's most famous works include Portrait of Adele Bloch-Bauer I and The Kiss. His style evolved over time from a realistic approach to a more dreamlike and stylized one characterized by flat patterns and mosaic-like elements.