"Early German Paintings at Kleinberger's." Art News 27 (November 3, 1928), pp. 1–2, ill., as "Portrait of a Nobleman".
Frank Jewett Mather Jr. "An Exhibition of German Primitives." Arts 14 (December 1928), p. 310, calls it "the portrait of a dull or moody (one is not sure which) nobleman".
"Early German Exhibition at Kleinberger's." Art News 27 (November 10, 1928), p. 5, as dated 1537; calls it "arresting" and "superb".
[Frank E. Washburn] F[reund]. "Sammler und Markt: Vom New Yorker Markt." Der Cicerone 21 (1929), p. 333, ill. p. 326, as "Bildnis eines Edelmannes"; gives the date as 1536.
Max J. Friedländer and Jakob Rosenberg. Die Gemälde von Lucas Cranach. Berlin, 1932, p. 98, no. 367, ill., include it in a group of four portraits that they tentatively attribute to an artist they call the Meister der Gregorsmessen (Master of the Mass of St. Gregory), after the painter of a work of that subject in the Staatsgalerie, Aschaffenburg; read the date as 1537.
Charles L. Kuhn. A Catalogue of German Paintings of the Middle Ages and Renaissance in American Collections. Cambridge, Mass., 1936, p. 44, no. 144, calls it "Portrait of a Bearded Man," and notes Friedländer and Rosenberg's [see Ref. 1932] attribution to the Master of the Mass of St. Gregory.
Harry B. Wehle and Margaretta Salinger. The Metropolitan Museum of Art: A Catalogue of Early Flemish, Dutch and German Paintings. New York, 1947, pp. 206–7, ill., state that it was probably "painted by one of the less able assistants working in Cranach's shop"; read the date as 1537.
Millia Davenport. The Book of Costume. New York, 1948, vol. 1, p. 396, no. 1055, ill., as School of Cranach; dates it 1535.
Max J. Friedländer and Jakob Rosenberg. The Paintings of Lucas Cranach. rev. ed. Ithaca, N.Y., 1978, pp. 161–62, no. sup 17, ill.
Andreas Tacke. Der katholische Cranach: Zu zwei Großaufträgen von Lucas Cranach d.Ä., Simon Franck und der Cranach-Werkstatt (1520–1540). Mainz, 1992, pp. 62–63, identifies the Master of the Mass of St. Gregory as Simon Franck, a painter believed to have been attached to Cranach's workshop, and attributes the MMA painting to him.