A festival celebrated with games every ten years by the
Roman emperors. This festival owed its origin to the fact that Augustus refused the supreme
power when it was offered to him for life, and would only consent to accept it for ten years;
and when these expired, for another period of ten years; and so on to the end of his life. The
memory of this comedy, as Gibbon has called it, was preserved to the last ages of the Empire
by the festival of the Decennalia, which was solemnized by subsequent emperors every tenth
year of their reign, although they had received the imperium
and not for the limited period of ten years (Dio Cass. liii. 16; liv. 12; lviii. 24; lxxvi.