Columbia subject headings:
Hyrtakenos, Theodoros, active 12th century--Correspondence.
Harvard subject headings:
Byzantine Empire--History--1081-1453.
Byzantine Empire--History--Andronicus II Palaeologus, 1282-1328.
Theodorus, Hyrtacenus--Correspondence.
Princeton subject headings:
Byzantine Empire--History--1081-1453.
Byzantine Empire--History--Andronicus II Palaeologus, 1282-1328.
Theodorus, Hyrtacenus--Correspondence.