R. Fischer, R. Fischer, Peter Paul Rubens, Peter Paul Rubens, Berlin, Berlin, 1904, 1904, p. 61 (as P. P. Rubens);, p. 61 (as P. P. Rubens);, F. M. Haberditzl, F. M. Haberditzl, Die Lehrer des Rubens, Die Lehrer des Rubens, in: Jahrbuch der Kunsthistorischen Sammlungen des Allerhöchsten Kaiserhauses, in: Jahrbuch der Kunsthistorischen Sammlungen des Allerhöchsten Kaiserhauses, vol. 27, vol. 27, no. 1, no. 1, 1907, 1907, pp. 216/217, pp. 216/217, ill. p. 214, ill. p. 214, fig. 43 (as a self-portrait of Peter Paul Rubens);, fig. 43 (as a self-portrait of Peter Paul Rubens);, E. Verhaeren, E. Verhaeren, Rubens, Rubens, Leipzig, Leipzig, 1920, 1920, p. 80, p. 80, cat. no. 45, cat. no. 45, fig. 45 (as a self-portrait of Peter Paul Rubens);, fig. 45 (as a self-portrait of Peter Paul Rubens);, R. Oldenbourg, R. Oldenbourg, Rubens, Rubens, Munich, Munich, 1922, 1922, pp. 137/138, pp. 137/138, p. 139, p. 139, fig. 79 (as Peter Paul Rubens), fig. 79 (as Peter Paul Rubens), Attributions to Peter Paul Rubens and Anthony van Dyck have been suggested for this portrait of a man whose forehead seems scarred. The superior quality of the painting and its provenance from the collections of the Grand Dukes of Tuscany suggest that it is the work of a prominent artist., Attributions to Peter Paul Rubens and Anthony van Dyck have been suggested for this portrait of a man whose forehead seems scarred. The superior quality of the painting and its provenance from the collections of the Grand Dukes of Tuscany suggest that it is the work of a prominent artist.