the complete collapse of organized government in the region. References Shinnie, P.L. "Christian Nubia." The Cambridge History of Africa: Volume 2, c. 500 B.C.—A.D. 1050 edited by J.D. Fage. Cambridge: Cambridge University Press, 1978, pp. 556–88. Jakobielski, S. 1992. Chapter 8: "Christian Nubia at the Height of its Civilization." UNESCO General History of Africa, Volume III. University of California Press. 7th-century treaties Kingdom of Makuria Medieval Egypt History of Nubia 7th century in Egypt Treaties of Egypt