El Lissitzky was a Russian avant-garde artist, painter, graphic artist, designer, and art theorist of the 20th century. He played an active role in shaping new directions in Russian and international visual culture and was one of the key proponents of Suprematism. Lissitzky’s work had a profound impact on the development of avant-garde art and modern design. His visual language is defined by geometric forms, dynamic compositions, and an innovative approach to book and poster design.