This thesis examines the evolution of connoisseurship before and after the exhibition ‘Art Treasures of the United Kingdom’ (Manchester, 5 May-17 October 1857). This work reassesses how the Manchester exhibition affected both technical and critical skills, as well as the professional opportunities, of the Victorian experts of Old Master painting, print and drawing. Scholarship has not shed full light on the complex and interconnected network of critical, technical, religious, and political interactions at the base of the 1857 show. Some relevant issues, indeed, are still unexplored. For instance, scholars have generally ignored Giovanni Battista Cavalcaselle (1819-1897)’s involvement in the 1857 exhibition, as well as the connoisseurial...