Mondrian's work was a reaction against the ornate, cluttered world of 20th-century art. He sought to strip away the extraneous and reveal the essence of the thing.
Using only primary colors and geometric shapes, Mondrian's compositions are a testament to the power of minimalism.
But don't be fooled - there's depth and meaning behind these seemingly simple works of art.
Or, if you're feeling adventurous, try:
Escher's Perspective