“…The stones of which the monuments in Egypt are made must have gone through weathering and disintegration owing to their exposure to the outside atmosphere (Ismael, 2015). However, the process of natural weathering is slow but there are studies which shed light on the fact that changes in climatic conditions can exacerbate the disintegration of monuments (Camuffo, 1986;Sabbioni et al, 2008;Sabbioni et al, 2010;Brimblecombe et al, 2011;Ismael, 2015) Several experts have noticed discoloration and cracking being witnessed at the monuments of Luxor and the Great Pyramids in Memphis, along with others, due to the changes in temperature and humidity (Farouk, 2019). Exposure of stones to ultraviolet (UV) radiation may also result in their discoloration (Sitzia et al, 2021).…”