Chronogram consists of words in an inscription, so placed that the numeral letters give the date of a certain event thus recorded. The earliest instance occurs in stained glass, cir. 1062, at St. Peter's, Aix. There is another, of the time of Charles I, on the ceiling of the lantern in Winchester. The only letters which can be used are M, D, c, v, i, x, V, I.
Chronopius was a bishop of the time of Valentinian I, mentioned in his law of July 9, A.D. 369. His see is unknown; but, contrary to the laws, he had. applied to a secular magistrate, Claudianus, and again to another, against the decisions of a certain council, and for this he was deposed.