Bernard BerensonBernard Berenson (June 26, 1865 – October 6, 1959) was an American art historian specializing in the Renaissance. His book ''The Drawings of the Florentine Painters'' was an international success. His wife Mary is thought to have had a large hand in some of the writings.
Berenson was a major figure in the attribution of Old Masters, at a time when these were attracting new interest by American collectors, and his judgments were widely respected in the art world. Provided by Wikipedia