Ludwig, A. I. (1967). [Grotte Vaticane. Tomb of the Pope Sisto IV by Antonio del Pollaiolo, 1493. Sepulchral monuments, the seven virtues and liberal arts. Details of the virtues (Vatican City)].
Chicago Style CitationLudwig, Allan I. [Grotte Vaticane. Tomb of the Pope Sisto IV By Antonio Del Pollaiolo, 1493. Sepulchral Monuments, the Seven Virtues and Liberal Arts. Details of the Virtues (Vatican City)]. 1967.
MLA CitationLudwig, Allan I. [Grotte Vaticane. Tomb of the Pope Sisto IV By Antonio Del Pollaiolo, 1493. Sepulchral Monuments, the Seven Virtues and Liberal Arts. Details of the Virtues (Vatican City)]. 1967.