Cultural Heritage materials – This research topic is proposed within the framework of the UGA Cross Disciplinary Program PATRIMALP, which brings together research laboratories studying ancient artworks. Here, we focus on the analysis of relief decorations found on artworks of the late Middle Ages. Our aim is to perform non-invasive X-ray powder diffraction (XRPD) and fluorescence (XRF) measurements of artworks on site, by using a mobile instrument developed at Néel Institute. Thanks to such an instrument it becomes possible to reach a chemical and structural characterization of cultural heritage artefacts, paintings, sculptures, etc. without the need to displace them or to take samples.