Centuries - Year in Review 4th Century Year in Review
3rd century - 4th century - 5th century
Decades:300s, 310s, 320s, 330s, 340s, 350s, 360s, 370s, 380s, 390s
320 321 322 323 324 325 326 327 328 329 330
Births
Deaths
Events
- First Council of Nicaea - first "Ecumenical Council" of the Christian Church