425

By place

Roman Empire

• Summer - Joannes, Roman usurper, is defeated at the fortified city of Ravenna and brought to Aquileia. After a humiliating parade on a donkey and the insults of the populace, he is executed.
• October 23 - Valentinian III, infant son of Galla Placidia, is installed as emperor of the Western Roman Empire. Real power is in the hands of his mother who becomes a regent.
• Flavius Aetius leads a force of Huns into Northern Italy. He reaches a compromise with Placidia, in return for obtaining the rank commander-in-chief in Gaul.
• The Huns advance unopposed on Constantinople, but are halted by a plague that decimates their hordes.

  Palestine

• The Sanhedrin is disbanded by the Roman Empire.

  By topic

Arts and Sciences

• Last known usage of Demotic script in Egypt.
• c. 425-426 - Mausoleum of Galla Placidia is built.

  Education

• February 27 - The University of Constantinople is founded by emperor Theodosius II at the urging of his wife Aelia Eudocia.

  Religion

• Buddhism begins to spread to Southeast Asia.