A study for the figure on the spandrel above the door of the west wall of the nave in the Duomo, Parma frescoed by Gambara between 1571 and 1573, M. Tanzi, Lattanzio Gambara nel Duomo di Parma, Turin, 1992, illustrated in colour. A pen and ink modello for the whole wall is in the Accademia Carrara, Bergamo, G. Bora, I Disegni Lombardi e Genovesi del Cinquecento, Treviso, 1980, no. 74, illustrated. Other studies for the project are in the British Museum (A.E. Popham, Artists working in Parma in the Sixteenth Century, London, 1967, I, nos. 38-40, II, pls. 33-5) and in the Louvre, G. Bora, op. cit., no. 75, illustrated