Byzantium and the Slavs by Dimitri Obolensky
(Τελευταία επίσκεψη: 28/8/2008)
The establishment of the theme of Cherson, by efforts of Emperor Theophilos.
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Themes and Order of Battle. The New Roman Empire
(Τελευταία επίσκεψη: 28/8/2008)
The organisation in themes of the Byzantine Empire.
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