3rd century - 4th century - 5th century
Decades: 290s?, 300s, 310s, 320s, 330s, 340s, 350s?, 360s, 370s?, 380s, 390s
Years: 310? 311? 312 313 314? 315? 316? 317? 318? 319?
decade: 300s 310s 320s - 4th century