This article is about the year 306 AD. For other uses, see 306 (disambiguation).

Events

By Place

Roman Empire

• July 25 — Constantine I is proclaimed Emperor by his troops.
• October 28 — Maxentius, son of the former Emperor Maximian, is proclaimed Emperor.
• Flavius Valerius Severus is proclaimed Augustus.
• Santa Maria Maior de Lisboa is built in Lisbon.
• The Franks cross the Rhine, but are repulsed by Constantine I.

Asia

• The War of the Eight Princes ends in China.

By Topic

Religion

• The Council of Elvira declares that killing through a spell is a sin and the work of the devil.
• Saint Metrophanes becomes bishop of Byzantium.
• Christianity is established in Britain. British bishops participate in the councils of Arles (314), Nicaea (325) and Arminum (349).

Births

• Ephrem the Syrian, Christian saint and prolific hymn writer, in Nisibis, Mesopotamia (approximate date)

Deaths

• Constantius Chlorus, father of Constantine I, in York
• Sima Ying
• Sima Yong