Æmilian, Valerian, Gallienus. 253 257 Sixtus II. 259 Dionysius. Claudius II. 268 269 Felix. Aurelian. 270 275 Eutychianus. Tacitus. 275 Probus. 276 Carus. 282 283 Caius. Carinus, Numerian, Diocletian. 284 Maximian, joint Emperor with Diocletian. 286 296 Marcellinus. [305(?) 304 Vacancy. Constantius, Galerius. 304(?) Licinius. or 307] 308 Marcellus I. Maximin. 308 Constantine, Galerius, Licinius, Maximin, Maxentius, and Maximian reigning jointly. 309 310 Eusebius. 311 Melchiades. 314 Sylvester I. Constantine (the Great) alone. 323 336 Marcus I. 337 Julius I. Constantine II, Constantius II, Constans. 337 Magnentius. 350 352 Liberius. Constantius alone. 353 356 Felix (Anti-pope). Julian. 361 Jovian. 363 Valens and Valentinian I. 364 366 Damasus I. Gratian and Valentinian I. 367 Valentinian II and Gratian. 375 Theodosius. 379 384 Siricius. Arcadius (in the East), Honorius (in the West). 395 398 Anastasius I. 402 Innocent I. Theodosius II. (E) 408 417 Zosimus. 418 Boniface I. 418 Eulalius (Anti-pope). 422 Celestine I. Valentinian III. (W) 424 432 Sixtus III. 440 Leo I (the Great). Marcian.