 The degree of crystallinity of cellulose was measured using X-ray diffraction, XRD, and Fourier transform infrared, FTR, spectroscopy to determine the effects of weathering on wood samples. Results showed an increase in the crystallinity index, CI, of cellulose with weathering, as well as an increase in the size of crystallites. Additionally, the amorphous fraction of wood was reduced, leading to an enrichment of the relative crystalline content. FTR analysis revealed that weathering had a greater impact on uncoated samples than uncoated ones due to their protective properties. Correlation between the crystallinity indexes obtained from X-RD and FTR was found, suggesting that this method could be used to quickly estimate the degradation level of wood exposed to weathering. This methodology has potential applications in the field of conservation and restoration of wooden objects or in the industry of wood coatings. This article was authored by Alfonso Maffizoli, Giuseppe Vassapallo, Donato Canaletta, and others. We are article.tv, links in the description below.