Fig. 3From: The Girl in the Spotlight: Vermeer at work, his materials and techniques in Girl with a Pearl Earringa Stitched 3D digital microphotograph (×140, 1.1 µm/pixel) showing the monogram in the signature. b Stitched 3D digital microphotograph (35x, 4.4 μm/pixel) showing the whole signature. c The signature, traced from MA-XRF elemental maps [7]Back to article page