Bartz, W. and Jakubek-Raczkowska, M. 2021. The Beautiful Madonna of Gdańsk and Virgin Mary from the St Ann’s Chapel in Frombork in the Light of Petrographic Analysis: Some Remarks on their Material and Artistic Provenance. Acta Universitatis Nicolai Copernici [Heritage Studies and Conservation Science]. 52, (Dec. 2021), 83–145. DOI:https://doi.org/10.12775/AUNC_ZiK.2021.004.