Lantern slide. Showing the Sultan Hassan Mosque mauseleum in Cairo. This photograph was taken by Sgt. Johnson of the 436 Welsh Field Company c. 1917. It formed part of a lecture which he gave. His notes read 'Sultan hassan Mosque Cairo. The walls show the marks of the canon ball fired from the Citadale by Napoleon'. The mosque is one of the largest in the world. Work was begun on the mosque in 1356 and it remains one of the finest examples. This view is similar to EC1795.