Note 121
Theophanes speaks of the coronation and unction of Charles, Ancient Greek(Chronograph. p. 399,) and of his treaty of marriage with Irene, (p. 402,) which is unknown to the Latins. Gaillard relates his transactions with the Greek empire, (tom. ii. p. 446 - 468.)
The History Of The Decline And Fall Of The Roman Empire Fall In The EastChapter 49