Pioneering the abstract art movement, Piet Mondrian's "Composition with Red Blue and Yellow," Kazimir Malevich's "Black Square," and Hilma af Klint's "Svanen" represent a radical shift in artistic expression. These works eschew traditional representation to focus on geometric forms, color theory, and spirituality. Mondrian's grid-based paintings emphasize balance and purity; Malevich's stark monochrome predates minimalism; and af Klint's mystical compositions predate abstraction as it's known. Each piece marks a significant departure from figurative art, reflecting the artists' desire to depict a deeper reality beyond the physical world, influencing countless artists and movements that followed.