Abstract
• A multidisciplinary study of the only autograph painting of Gian Lorenzo Bernini. • Integrated approach by using imaging and spectroscopic techniques. • Materials characterization by LIF, XRF, Raman, FT-IR, and UV–VIS–NIR. • Discussion about the fact that the artwork could not be a preparatory drawing. • New advances concerning the Bernini's drawing technique. The artwork “ St. Joseph with the Child ”, preserved in Palazzo Chigi of Ariccia (Rome), is today the only painting signed by Gian Lorenzo Bernini. In this work, for the first time, an integrated spectroscopic imaging and analysis approach was performed to study and characterize Bernini's wall painting. Complementary in situ analyses, imaging in the UV–VIS–NIR–SWIR range, FT-IR spectroscopy, Raman spectroscopy, laser-induced fluorescence and XRF were performed to obtain information on the state of conservation, the execution technique and the composition of the materials of the painting investigated. The results achieved were discussed and delivered to the conservator of Palazzo Chigi, to plan further restoration treatments and conservation programs. In conclusion, preliminary considerations are presented to define if the painting studied represents a definitive painting or a preparatory drawing.
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