on bottom and inside of base: ASTORGIVS.MANFREDVS./ SECVDVS.FAVENTIE.DOMINVS / ANNO.XLII.ETATIS.SVE / 1455 / OPVS.NINI
Louis-Charles Timbal [1821-1880], Paris. Baron Arthur de Schickler [1828-1919], Paris, and Martinvast, Normandy (near Cherbourg); by inheritance to his daughter, Marguerite, Comtesse Hubert de Pourtalès [1870-1956], Paris, and Martinvast, Normandy; sold April 1919 to (Duveen Brothers, Inc., London, New York, and Paris) in part-share agreement with (Wildenstein & Co., Inc., New York) and (Arnold Seligmann & Co., Paris); inheritance from Estate of Peter A.B. Widener by gift through power of appointment of Joseph E. Widener, Elkins Park, Pennsylvania, after purchase 13 January 1922 by funds of the Estate; gift 1942 to NGA.
- Masterpieces of World Art from American Museums from Ancient Egyptian to Contemporary Art, The National Museum of Western Art, Tokyo; The Kyoto National Museum, Japan, 1976, no. 18.
- Works of Art from the Widener Collection. Foreword by David Finley and John Walker. National Gallery of Art, Washington, 1942: 8.
- Swarzenski, Georg. "Some Aspects of Italian Renaissance Sculpture in the National Gallery." Gazette des Beaux-Arts 6th series, 24 (September 1943): 154 fig. 3.
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- Paintings and Sculpture from the Widener Collection. National Gallery of Art, Washington, 1948 (reprinted 1959): 120, repro.
- Summary Catalogue of European Paintings and Sculpture. National Gallery of Art, Washington, 1965: 163.
- European Paintings and Sculpture, Illustrations. National Gallery of Art, Washington, 1968: 144, repro.
- Walker, John. National Gallery of Art, Washington. Rev. ed. New York, 1984: 625, no. 965, repro.
- Sculpture: An Illustrated Catalogue. National Gallery of Art, Washington, 1994: 153, repro.
- Norman Herz, Katherine A. Holbrow and Shelley G. Sturman. "Marble Sculture in the National Gallery of Art: a Provenance Study." In Max Schvoerer, ed. Archéomatériaux: marbres et autres roches: ASMOSIA IV, Bordeaux, France 9-13 october 1995: actes de la IVème Conférence international de l’Association pour l’étude des marbres et autres roches utilizes dans le passé. Talence, 1999: 101-110.
- National Gallery of Art Special Issue. Connaissance des Arts. Paris, 2000:59.