Fig. 10

a Detail of Mountains at Saint-Rémy juxtaposed with b an overlap of the bromine (Br Kα), cobalt (Co Kα), copper (Cu Kα), iron (Fe Kα), and chromium (Cr Kα) distribution maps acquired by MA-XRF. The gray arrows in the latter image indicate some of the locations where eosin red (Br) and an iron-containing pigment (Fe), likely Prussian blue, were used to outline the mountains