Synesius passed three years (A.D. 397-400) at Constantinople as deputy from Cyrene to the emperor Arcadius. He presented him with a crown of gold, and pronounced before him the instructive oration de Regno (p. 1-32, edit. Petav. Paris, 1612). The philosopher was made bishop of Ptolemais, A.D. 410, and died about 430. See Tillemont, Mem. Eccles. tom. xii. p. 499, 554, 683-685.