He suffered, as it is supposed, in the persecution of Diocletian (Tillemont, Mem. Eccles. tom. v. p. 279,696). Gregory of Tours, his peculiar votary, has dedicated to the glory of Julian the Martyr an entire book (de Gloria Martyrum, l. ii. in Max. Bibliot. Patrum, tom. xi. p. 861-871), in which he relates about fifty foolish miracles performed by his relics.