_Odowakar_, his position and history, 96.
_Odysseus_, his relation to his overlord, 18.
_Olbia_, Diôn Chrysostom’s account of, 231.
_Olympiad_, First, a starting-point, 10, 11.
_Otto the Great_, Emperor, 131.
_Otto the Third_, Emperor, 131.
_Ottoman Turks_, their advance in Asia and Europe, 165-168.