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original: "Porphyrogenitus"; a title given to an Emperor born in the purple porphyry chamber of the imperial palace, signifying legitimacy.
original: "De Administrando Imperio"; a mid-10th-century manual of foreign policy and statecraft written by Emperor Constantine VII for his son.
Dumbarton Oaks A Harvard University research institute in Washington, D.C., specializing in Byzantine, Pre-Columbian, and Garden studies., Constantine Porphyrogenitus Constantine VII (reigned 913–959), a scholar-emperor known for his encyclopedic projects., De Administrando Imperio One of the most important sources for the geography and ethnography of the neighbors of the Byzantine Empire., Byzantine Empire The medieval continuation of the Roman Empire in the East, centered at Constantinople.