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Detail of the right hand of Michelangelo's "David", 1501-4, in the Accademia in Florence.

Photo: akg-images / Rabatti - Domingie

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Albrecht Dürer's watercolour of a young hare, 1502, in the Albertina in Vienna.

Photo: akg-images / Erich Lessing

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A detail from Hugo van der Goes' "Adoration of the Shepherds", 1476 to 1478, in the Uffizi in Florence.

Photo: akg-images / Rabatti - Domingie

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Veronese's "Venus and Mars", circa 1575/80, in the Galleria Sabauda in Turin.

Photo: akg-images / Electa

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A detail from Botticelli's "Birth of Venus", 1482, in the Uffizi in Florence.

Photo: akg-images / Rabatti - Domingie