"What is modernity?'ktsked Baudelaire. He was answered by those four pillars" of 20* century art'ricasso, who atomised form, Matisse, who emancipated colour, Duchamp, who abolished the artwork in his "ready-mades", and Male-vich, who brandished his iconic Black Sauare like a crucifix. Each might have adopted Picasso's 1923 dictum: "in art, we express what nature is not". Malevich said something similar in relation to his Black Square: "Comrades, arise, free yourselves from the tyranny of objects".