| Sumario: | An investigation of the disintegrated mural paintings at the Hospice (Takiya) of Taqi Al-Din Al -Bistami dated back to (AH 847 / AD 1443) by various physicochemical techniques is presented. Deterioration phenomena such as cracks, loss in the preparation layers, colour changing, calcifications, salt efflorescence and soot were analytically studied. Analytical work was made to determine the origin of the archaeological used materials, such as, light optical microscope, SEM-EDX, X- Ray diffraction (XRD), Fourier transform infrared (FTIR). It is found two different preparation layers of a mixture of calcite, gypsum, and quartz. Red hematite and cinnabar, green malachite, yellow goethite and blue ultramarine were used as pigments. Identifying animal glue binder indicated that mural painting followed the tempera technique. The results of the research contribute to the conservation project of mural paintings.
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