Consistency requires you to be as ignorant today as you were a year ago.

Duveen mustered Berenson's and other experts' support for his opinion dismissing Hahn's painting as a copy. In 1923 Berenson was called to give expert witness in a famous case brought by Andrée Hahn against Duveen. Works
Venetian Painters of the Renaissance (1894)
Lorenzo Lotto: An Essay in Constructive Art Criticism (1895)
Florentine Painters of the Renaissance (1896)
Central Italian Painters of the Renaissance (1897)
The Sense of Quality: Study and Criticism of Italian Art (1901; second series 1902)
The Drawings of the Florentine Painters (1903) his masterpiece[citation needed]
North Italian Painters of the Renaissance (1907)
A Sienese Painter of the Franciscan Legend (1910)
Venetian Painting in America: The Fifteenth Century (New York 1916)
Essays in the Study of Sienese Painting (New York 1918)
Aesthetics ethics and history in the arts of visual representation (Estetica Etica e Storia nelle Arti della Rappresentazione Visiva) (1948)
The Italian Painters Of The Renaissance (1952)
Rumor and Reflection (New York 1952)
Caravaggio: his incongruity and his fame (1953)
Seeing and Knowing New York Graphic Society Ltd.

He was a major figure in pioneering art attribution and therefore establishing the market for paintings by the "Old Masters".