Introducere în studiul sticlei de fereastră descoperite la Catedrala Romano-Catolică și Palatul Episcopal din Alba Iulia
An introduction to the study of the window glass from the Roman-Catholic Cathedral and the Bishop’s Palace in Alba-Iulia

Summary/Abstract: Archaeological investigations at the Roman-Catholic Cathedral and Episcopal Palace site in Alba Iulia uncovered, among many other finds, hundreds of glass fragments that were once part of basic stained-glass windows. Archaeological context analysis indicates a dating range from the thirteenth to the eighteenth centuries, with certain fragments representing some of the earliest discoveries of this type in Transylvania. PIXE-PIGE analyses on 17 glass fragments of window panes were performed at the AGLAE accelerator, located in the basement of the Louvre Palace, Paris, France. The analytical results indicated that most of them were made of HKEG (High Potash European Glass) glass, a chemical type of glass widespread in Europe during the Middle Ages, preferentially used for making window panes for cathedrals. A single sample was identified as being made of HLLA (High Lime Low Alkali) glass, suggesting a later temporal attribution (post 14th c. AD), while another piece had the typical signature of façon de Venise glass, a strong argument pointing towards the import of glass from Western Europe during the 16th–17th centuries

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