The present work aim was to study two composite textile pieces from Santarém Diocesan Museum, including their historic context, their conservation condition and the characterization of their constituent parts, which established the date of production. Both pieces belonged to the First Bishop of Daman (1840-1900) and were selected for their historic interest and originality, and for representing a case study in terms of materials, techniques and decoration. They are also a good example of the conservation problems that can occur in liturgical textiles. The diagnosis was extended using optical microscopy, Fourier transform infrared spectroscopy, energy dispersive X-ray fluorescence and Raman spectroscopy. These techniques allowed the identification of the fibres, binder, metals and pigments, confirming that the pieces date back to the late nineteenth century. Among the main forms of degradation, it was observed: structural deformations, dirt and material losses, not only in areas with fabric but also with metallic embroidery and painted layers. Resumo Este trabalho teve como principal objetivo o estudo de duas peças têxteis compósitas do Museu Diocesano de Santarém, incluindo o seu contexto histórico, o estado de conservação e a caracterização dos elementos que as constituem, ajudando na sua datação. Ambas, pertencentes ao espólio do Primeiro Bispo de Damão (1840-1900), foram selecionadas pelo interesse histórico e originalidade, e pelo caso de estudo que representam ao nível material, técnico e decorativo. As duas peças são também consideradas um bom exemplo das problemáticas associadas à conservação de têxteis litúrgicos. O diagnóstico foi aprofundado mediante microscopia ótica, espectroscopia de infravermelho com transformada de Fourier, fluorescência de raios X por energia dispersiva e espectroscopia de Raman. Estas técnicas permitiram a identificação das fibras, ligante, metais e pigmentos, confirmando que as peças datam de finais do século XIX. Entre as principais formas de degradação destacam-se: deformações estruturais, sujidade e perda de material, tanto nas áreas com tecido, como com bordado metálico e camada pictórica. Palavras-chave Têxteis litúrgicos Estado de conservação Seda e algodão Pintura sobre seda Elementos metálicos
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