Centuries: 3rd century - 4th century - 5th century
Decades: 260s 270s 280s 290s 300s - 310s - 320s 330s 340s 350s 360s
Years: 309 310 311 312 313 - 314 - 315 316 317 318 319
- August 30 - Council of Arles, which confirmed the pronouncement of Donatism as a schism, and passed other canons.
- Synod of Ancyra: consulting a magician is declared a sin earning five years of penance.
- Pope Silvester I succeeds Pope Miltiades.
- Alexander becomes Bishop of Byzantium.