"Federico Zeri Foundation, cataloguing institution of the photograph \"National Gallery of Art, Washington , Boccaccino, Pseudo. Lombard Beginning of XI Century. Saint John the Evangelist, Boccaccino, Pseudo. Lombard Beginning of XI Century. Saint Matthew\""@en . "Fondazione Federico Zeri - Università di Bologna, ente catalogatore della fotografia \"National Gallery of Art, Washington , Boccaccino, Pseudo. Lombard Beginning of XI Century. Saint John the Evangelist, Boccaccino, Pseudo. Lombard Beginning of XI Century. Saint Matthew\""@it . . . . .