324

{| align=right cellpadding=3 id=toc style="margin-left: 15px;"\n|- \n| align="center" colspan=2 | Years:
320 321 322 323 - 324 - 325 326 327 328\n|-\n| align="center" colspan=2 | Decades:
290s 300s 310s - 320s - 330s 340s 350s\n|- \n| align="center" | Centuries:
3rd century - 4th century - 5th century\n|} Events\n* Constantine becomes the sole emperor of the Roman Empire. End of the Tetrarchy as the Roman mode of government. \n* St Peter's Church, Rome, founded.\n*Eustathius becomes bishop of Antioch Births Deaths\n* December 20 - Philogonus, Patriarch of Antioch\n* Licinius, former Roman Emperor, executed for treason \n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n