Funeral costumes are elements of funerary furnishings with very different characteristics. Their form has not only been influenced by local funeral customs but also by the property status of the families of the deceased and the fashion trends prevailing in a given region. The study of funerary clothing clearly translates into the general development of knowledge about the evolution of fashion, and thus the issue is no longer only the domain of costume specialists, but also archaeology. This is clearly discernible on the example of the results of archaeological research conducted in the crypts of the Church of St. Name of the Blessed Virgin Mary – over 100 burials turned out to be hiding the largest archaeological collection of modern funerary clothing from the former Polish-Lithuanian Commonwealth. Against the background of these costumes, the clothes in which the woman placed in burial no. 8 (EA crypt) stands out. Her attire took an exceptionally impressive form, as evidenced by the fact that this tomb aroused the interest of the local population long before archaeologists arrived in Szczuczyn. According to the stories of the locals, she was buried in a wedding dress. As a result of the verification carried out both on the stand and as a result of laboratory analyses, it was determined whether this theory can be confirmed with the use of scientific methods. The analyses, apart from referring to the theory of stories told by local history enthusiasts, turned out to contribute a lot to the current state of knowledge on the development of 18th-century women’s fashion.