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espanolSe estudian las vidrieras de la Catedral de Astorga a partir de dos ejemplos representativos: la Aparicion de Jesus resucitado a la Virgen Maria y el Apostol San Simon (ss. XVI-XVIII). Se realizo su estudio historico-artistico y el arqueometrico de una seleccion de fragmentos de vidrio, con el fin de obtener informacion sobre su tecnologia de produccion. El estudio arqueometrico consistio en la determinacion de la composicion quimica de los vidrios, la caracterizacion de sus cromoforos y el estudio de las grisallas. Se determinaron distintos tipos de vidrio, lo que permitio establecer su posible cronologia, y diversos cromoforos y grisallas de sombreado y de contorno. El analisis critico de los datos historico-artisticos y los arqueometricos puso de manifiesto convergencias y divergencias de datacion asi como restauraciones anteriores que ubicaron fragmentos en posiciones inadecuadas. portuguesOs vitrais da Catedral de Astorga sao estudados a partir de dois exemplos representativos: a Aparicao do Jesus ressuscitado a Virgem Maria e o Apostolo Sao Simao (seculos XVI-XVIII). Seu estudo historico-artistico e a arqueometria de uma selecao de fragmentos de vidro foram realizados para obter informacoes sobre sua tecnologia de producao. O estudo arqueometrico consistiu na determinacao da composicao quimica dos vidros, na caracterizacao de seus cromoforos e no estudo de grisailles. Diferentes tipos de vidro foram determinados, o que permitiu estabelecer sua possivel cronologia, e varios cromoforos e grises de sombreamento e contorno. A analise critica dos dados historico-artisticos e arqueometricos revelou convergencias e divergencias de datacao, bem como de restauracoes previas que colocaram fragmentos em posicoes inadequadas. EnglishThe conservation of the stained glass windows of the Cathedral of Astorga has been evaluated from two representative items: the windows of the Aparicion de Jesus resucitado a la Virgen Maria and the Apostol San Simon (16th-18th centuries A.D.). The historic and artistic study of such stained glass windows was accomplished and a selection of glass fragments was used to undertake the archaeometric study in order to obtain information on their production technology. Chemical composition of glasses, chromophores characterization and study of grisailles contributed to the archaeometric objectives. Different types of glasses, chromophores and grisailles were determined, which allowed the establishment of their possible chronology. Critical analysis of historical, artistic and archaeometric data demonstrated both convergences and divergences on chronology of glasses as well as the inadequate reusing of glass fragments during past restorations.

Estudio histórico y arqueométrico de dos vidrieras de la Catedral de Astorga