A tourist visits the Saladin Citadel in Cairo, Egypt, on Dec. 21, 2024. The Saladin Citadel, built by Saladin (1138-1193) in the 12th century, is one of Cairo's most famous landmarks. (Photo by Tao Yubin/Xinhua)

Tourists visit the Saladin Citadel in Cairo, Egypt, on Dec. 21, 2024. The Saladin Citadel, built by Saladin (1138-1193) in the 12th century, is one of Cairo's most famous landmarks. (Photo by Tao Yubin/Xinhua)

Tourists visit the Saladin Citadel in Cairo, Egypt, on Dec. 21, 2024. The Saladin Citadel, built by Saladin (1138-1193) in the 12th century, is one of Cairo's most famous landmarks. (Photo by Tao Yubin/Xinhua)