Microorganisms are one of the most dangerous damage factors that threaten archaeological cellulosic
textiles such as cotton and linen. This research presents a detailed study of the effect of fungi that have been isolated from the display and storage environment of Sohag National Museum on the mechanical, physical and chemical properties of archaeological linen textiles. The study used the potato Dextrose Agar, PDA. Nutritional medium in conducting microbial surveys of the museum display and storage environment;
the result of the survey was the presence of three fungal strains, Aspergillus flavus, Trichoderma sp. and Penicillium duclauxii, which dominated the display and storage atmosphere in the museum.