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PublicationStudy of deterioration mechanisms and protective treatments for the Egyptian limestone of the Ayyubid city wall of Cairo(2000-01-01) Bourguignon, ElsaThe al-Azhar project of the Aga Kahn Trust for Culture will create one of the largest urban parks in Cairo. This has brought attention to the eastern portion of the Ayyubid city wall which would border the western edge of the park. Partially buried during centuries, the stone wall presents different forms of deterioration, including flaking and disaggregation as well as large areas of salt crusts on the stone surface requiring a comprehensive conservation treatment. . .