Silvia Minghelli*, Pietro Baraldi*, Maria Teresa Guaitoli**
* Department of Chemistry, University of Modena and Reggio Emilia, Modena, Italy (
** Department of Archaeology, University of Bologna, Bologna, Italy (
Abstract
This study aims to a chemical and physical characterization of the numerous fragments of polychrome stuccos and plasters found during the archaeological investigation carried out below the floor of the Basilica of Santa Maria Maggiore in Trento, Italy. The chemical identification of pigments and painting techniques used, was of great importance to know the nature of pictorial materials discovered during the excavations. This information was also essential to identify the time of execution of the decorations and to connect the decorations with the construction phases of the church. The main analytical techniques used to determinate the composition of the samples were Fourier Transform infrared spectrometry (FT-IR), Raman microscopy and X-ray Fluorescence (XRF).
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