The metal model was attributed by Bange and De Ricci to the workshop of Donatello, and dated to the end of the fifteenth century.2 Pope-Hennessey rejected that attribution, and dated it to around 1500.3 Warren supposed a date of ca 1460-1480 and drew attention to two variants, one of which has a blank exergue omitting the lower portion of the drapery, and the other has the drapery continuing to the edge of the plaquette. (Just one of the eight bindings has the blank exergue, Hobson 3d, a binding executed in Milan about 1510 for Jean Grolier.) Hobson’s speculation that the plaquette might have been copied from an antique intaglio is not endorsed by Warren.4 Stanko Kokole suggested that this plaquette may be among those produced in Rome in the foundry of Cardinal Pietro Barbo (1417-1471), elected in 1464 to succeed Pope Pius II.5
1. A. Hobson, Humanists and bookbinders: the origins and diffusion of the humanistic bookbinding 1459-1559, with a census of historiated plaquette and medallion bindings of the Renaissance (Cambridge 1989), p.216 nos. 3a-3g. No additional examples are described in Hobson’s two supplements: “Plaquette and medallion bindings: A supplement” in Bulletin du bibliophile (1994) pp.24-37; “Plaquette and medallion bindings: a second supplement” in For the love of the binding: Studies in bookbinding history presented to Mirjam Foot (London 2000), pp.67-79.
2. Ernst Friedrich Bange, Die italienischen Bronzen der Renaissance und das Barock (Berlin 1914-1922), no. 65 (Italy, end 15C). Seymour de Ricci, The Gustave Dreyfus Collection. Reliefs and plaquettes (Oxford 1931), p.41, no. 44 & Pl. 17 (as Florentine, 15C).
3. John W. Pope-Hennessy, Renaissance Bronzes from the Samuel H. Kress Collection: Reliefs, plaquettes, statuettes, utensils and mortars (London 1965), p.77, no. 264, fig. 15.
4. Jeremy Warren, A Catalogue of the Collection in the Ashmolean Museum, Oxford: Medieval and Renaissance sculpture, Volume 3: Plaquettes (Oxford 2014), pp.909-910 nos. 368-370 (p.910: “no convincing source has yet been identified and most scholars have chosen instead to see it as a fifteenth-century work in a classicising style.”). Michael Riddick, “Glyptics, Italian Plaquettes in France and their reproduction in enamel” in Renaissance Bronze (post, 7 November 2019), p.10 (“The plaquette is possibly a freehand invention after the antique, conceived during the last quarter of the 15th century and widely diffused”; the Ubertazzi example illustrated) [link].
5. Stanko Kokole, “The Silver Shrine of Saint Simeon in Zadar: Collecting ancient coins and casts after the antique in fifteenth-century Dalmatia” in Collecting Sculpture in Early Modern Europe, edited by Nicholas Penny & Eike D. Schmidt (Washington, DC 2008), pp.111-127 (pp.112,115 fig. 9, 122 n. 12) [link].
Left Detail fron no. 8 below
Centre National Gallery of Art, 1957.14.168 [link]
Right Ubertazzi Collection (Riddick)
(1) Quintus Asconius Pedianus, Q. A. Pedianus. i[n] senatu co[n]tra. L. Pisonem (Venice: Johannes de Colonia and Johannes Manthen, between 2 June and 12 September 1477)
Lower cover (Julius Caesar, laureate, Hobson 13, on the upper cover)