2 Gogh Studied by Means of Synchrotron X-ray Spectromicroscopy and 3 Related Methods. 2. Original Paint Layer Samples 4 Letizia Monico, Geert Van der Snickt, Koen Janssens,* Wout De Nolf, Costanza Miliani, Joris Dik, 5 Marie Radepont, Ella Hendriks, Muriel Geldof, and Marine Cotte 6 Dipartimento di Chimica, Universit a degli Studi di Perugia, via Elce di Sotto 8, I-06123 Perugia, Italy 7 Department of Chemistry, University of Antwerp, Universiteitsplein 1, B-2610 Wilrijk, Belgium 8 Istituto CNR di Scienze e TecnologieMolecolari (CNR-ISTM), c/oDipartimento di Chimica, Universit a degli Studi di Perugia, via Elce 9 di Sotto 8, I-06123 Perugia, Italy 10 Department of Materials Science and Engineering, Delft University of Technology, Mekelweg 2, NL-2628CD Delft, The Netherlands 11 Centre de Recherche et de Restauration des Mus ees de France, CNRS UMR171, Palais du Louvre, Porte des Lions, 14 Quai Franc-ois 12 Mitterrand, F-75001 Paris, France 13 Van Gogh Museum, Paulus Potterstraat 7, 1070 AJ Amsterdam, The Netherlands 14 The Netherlands Cultural Heritage Agency (RCE), Movable Heritage Knowledge Sector, Hobbemastraat 22, 1071 ZC Amsterdam, 15 The Netherlands 16 European Synchrotron Radiation Facility, Polygone Scientifique Louis N eel -6, rue Jules Horowitz F-38000 Grenoble, France