Geometric abstraction is a type of abstract art that focuses on geometric shapes, such as lines, circles, squares and triangles. This style emerged in the early 20th century alongside other modernist movements like Cubism and Futurism. Geometric abstraction artists use these basic forms to create complex compositions with minimal or no reference to external visual reality. The aim is often to explore the relationships between colors, shapes, and spaces within a two-dimensional surface. Some famous examples of geometric abstract art include Piet Mondrian's "Composition II" and Kazimir Malevich's "Black Square."