After the exile of Eustathius, under the reign of Constantine, the rigid party of the orthodox formed a separation which afterwards degenerated into a schism, and lasted above fourscore years. See Tillemont, Mem. Eccles. tom. vii. p. 35-54, 1137-1158, tom, viii. p. 573 632, 1314-1332. In many churches the Arians and Homoousians, who had renounced each other's communion, continued for some time to join in prayer. Philostorgius, l. iii. c. 14.