Among the few surviving archaeological sites from the medieval Christian kingdom of Nubia--located in present day Sudan--Qasr Ibrim is unique in a number of ways. It is the only site in Lower Nubia that remained above water after the completion of the Aswan high dam. In addition, thanks to the aridity of the climate in the area the site is marked by extraordinary preservation of organic material, especially textual material written on papyrus, leather, and paper. Particularly rich is the textual material from the twelfth and thirteenth centuries CE, written in Old Nubian, the region's indigenous language. As a result, Qasr Ibrim is probably the best documented ancient and medieval site in Africa outside of Egypt and North Africa.