Bernard Berenson (1865-1959) was an American connoisseur of Lithuanian Jewish extraction who was a hugely significant figure in the evolution of the commercial art world from the late 1880s to the 1940s. This book examines his conception of connoisseurship and its impact through his famous protégés, who included Geoffrey Scott, Meyer Shapiro, John Walker and especially art historian Kenneth Clark, of Civilisation fame. This is framed through a biographical account of Berenson’s complex and duplicitous character, together with a description of his important methods for determining authorship and assigning value to Renaissance artworks.