324

Events 
 By place 
 Roman Empire 
 July 3 – Battle of Adrianople: Emperor Constantine the Great defeats his rival Licinius near Adrianople.  They retreat to Byzantium. He invades Thrace with a Visgothic force and raids the countryside.  
 July – Battle of Hellespont: Crispus, destroys Licinius' naval fleet in the Dardanelles.
 September 18 – Battle of Chrysopolis: Constantine I defeats Licinius at Chrysopolis.  He becomes sole Emperor.
 December 19 – Licinius gives up his position as Emperor. 

 Religion 
 St Peter's Church is founded in Rome.
 Eustathius becomes bishop of Antioch.

 Births 
 Chu Suanzi, empress of the Jin Dynasty (d. 384)

 Deaths 
 December 20 – Philogonus, Patriarch of Antioch
 Guo Pu, Chinese writer (b. 276)
 Wang Dun, general of the Jin Dynasty (b. 266)
 Zhang Mao, ruler of Former Liang (b. 277)

Category:320s