The Art Treasures of America. reprint, 1977. New York, 1879, vol. 1, pp. 133–34, calls it "Godfrey de Bouillon and the Crusaders before Jerusalem" and notes that it is a "repetition of his fresco in the Berlin Museum".
"Gallery and Studio: The Metropolitan Museum of Art." Art Amateur 18 (December 1887), p. 7.
"The Fine Arts: Recent Gifts to the Metropolitan Museum." Critic (April 16, 1887), p. 194, as "Vision of Godfrey".
Walter Rowlands. "The Miss Wolfe Collection." Art Journal, n.s., (January 1889), pp. 13–14.
Catalogue of the Paintings in the Metropolitan Museum of Art. New York, 1898, pp. 152–53, no. 500, identifies several figures in this picture, including Godfrey of Bouillon leading the army of crusaders and offering a crown to the apparition of Christ, Peter of Amiens kneeling in the foreground, the lady Armida, and her knight Rinaldo.
Rebecca A. Rabinow. "Catharine Lorillard Wolfe: The First Woman Benefactor of the Metropolitan Museum." Apollo 147 (March 1998), pp. 51, 54 n. 14, fig. 5.
Lisa Small. Telling Tales II: Religious Images in 19th-Century Academic Art. Exh. cat., Dahesh Museum of Art. New York, 2001, pp. 40–41, fig. 39 (color), remarks that this scene is described in the 16th century poem "Jerusalem Delivered" by Torquato Tasso and that Bouillon, depicted on the white horse, became the first ruler of the Latin Kingdom of Jerusalem; notes that this picture is a replica of one of six murals commissioned from Kaulbach by Friedrich Wilhelm IV for the stairwell of the Neue Pinakothek in Berlin (now destroyed), adding that Kaulbach worked on the murals from 1847–63.