Fig. 1: Rembrandt van Rijn.
From: Two Rembrandt portraits in focus: assessing a potential relationship
Portrait of a 39-Year-Old Woman. Oil on oak panel, 76.5 cm × 58.5 cm (originally 74.5 cm × 55 cm). The Nivaagaard Collection, 0047 NMK. Photographs of the recto (a) and the verso (b) taken under visible light, UVL of the recto (c) and the verso (d), and X-radiograph acquired in 1966 (e).
