Martin John Kemp FBA (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.

[7][8] He was professor of Art History at the University of Oxford from 1995 to 2008, during which he helped create the Centre for Visual Studies, which opened in 1999.

[5] In 2022, Kemp and author Waqas Ahmed created an online course entitled "The Da Vinci Masterclass" highlighting Leonardo's career.

Reviewing Visualisations, the historian of ideas Scott L. Montgomery described Kemp as like a "master gardener" who "for nearly two decades, [...] has helped shape this new field in major ways, planting a wide array of topics, arranging the colors of their importance, surveying and reconstituting the efforts of others, all the while adding original species of insight and subject matter.

In 2010 Kemp published a monograph with French engineer Pascal Cotte, recounting the story of how a team of experts—under his guidance—pieced together the evidence for the theory that the painting now named La Bella Principessa was by Leonardo.

The book, entitled La Bella Principessa (2010), narrates the steps Kemp and Cotte took in researching the painting.

The 2012 Italian edition, La bella principessa di Leonardo da Vinci[23] produces evidence about its origins.