Chemical Composition Of Medieval Stained Glasses From The Cathedral Of Leon (Spain)

A selection of glass samples from the stained glass windows of Leon Cathedral dating from Medieval and Renaissance times has been chemically characterized. The techniques used for this were X-ray diffraction, inductively coupled plasma, X-ray fluorescence and flame photometry. The analyses indicate that the samples are potash-lime glass, with the Medieval glass having a low alumina concentration. This fact has given rise to its deterioration throughout history due to environmental conditions.