Martin John Kemp (born 5 March 1942) is a British art historian and exhibition curator who is one of the world's leading authorities on the life and works of Leonardo da Vinci. The author of many books on Leonardo, Kemp has also written about visualisation in art and science, particularly anatomy, natural sciences and optics. Instrumental in the controversial authentication of Salvator Mundi to Leonardo, Kemp has been vocal on attributions to Leonardo, including support of La Bella Principessa and opposition to the Isleworth Mona Lisa.
