A white square floating weightlessly in a white field, Suprematist Composition: White on White was one of the most radical paintings of its day: a geometric abstraction without reference to external reality. Yet the picture is not impersonal: we see the artist’s hand in the texture of the paint and in the subtle variations of the whites. The square is not exactly symmetrical, and its lines, imprecisely ruled, have a breathing quality, generating a feeling not of borders defining a shape but of a space without limits.