Columbia subject headings:
Harvard subject headings:
Byzantine Empire--History--1081-1453.
Byzantine Empire--Social conditions.
Kekaumenos. Strategicon.
Komnēnos, Alexios, 1106-1142. Spaneas.
Philosophy--Byzantine Empire.
Princeton subject headings:
Byzantine Empire--History--1081-1453.
Byzantine Empire--Social conditions.
Kekaumenos. Strategicon.
Komnēnos, Alexios, 1106-1142. Spaneas.
Philosophy--Byzantine Empire.