Detail. Oil on canvas (transferred from panel), 42 × 33 cm. Hermitage Museum, Saint Petersburg.
Leonardo di ser Piero da Vinci (April 15, 1452 – May 2, 1519) was an Italian scientist, mathematician, engineer, inventor, anatomist, painter, sculptor, architect, botanist, musician and writer. Leonardo has often been described as the archetype of the Renaissance man, a man whose unquenchable curiosity was equaled only by his powers of invention. He is widely considered to be one of the greatest painters of all time and perhaps the most diversely talented person ever to have lived.
This is a detail of a painting of the Madonna and Christ Child. I have deleted the Christ Child because he is naked. Standards of decency are so much stricter now than they were 500 years ago!