Empire and Imperialism

Abulafia, David. Frederick II: A Medieval Emperor. Oxford and New York: Oxford University Press, 1992.

Carlyle, R. W., and A. J. Carlyle. A History of Mediaeval Political Theory in the West. 6 vols. Edinburgh and London: W. Blackwood, 1903–1936.

Fanning, Steven. "Bede, Imperium, and the Bretwaldas." Speculum 66 (1991): 1–26.

Folz, Robert. The Concept of Empire in Western Europe from the Fifth to the Fourteenth Century. Translated by Sheila Ann Ogilve. London: Edward Arnold; New York: Harper and Row, 1969.

Heer, Friedrich. The Holy Roman Empire. Translated by Janet Sondheimer. New York: Praeger, 1968.

Koebner, Richard. Empire. Cambridge, U.K.: Cambridge University Press, 1961.

Muldoon, James. Empire and Order: The Concept of Empire, 800–1800. New York: St. Martin's, 1999.

Pagden, Anthony. Peoples and Empires: A Short History of European Migration, Exploration, and Conquest, from Greece to the Present. New York: Modern Library, 2001.

Sullivan, Richard E., ed. The Coronation of Charlemagne: What Did It Signify? Boston: D. C. Heath, 1959.