320s
Millennium: | 1st millennium |
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The 320s decade ran from January 1, 320, to December 31, 329.
Events
320
By place
Roman Empire
- Crispus, eldest son of Constantine I, leads a victorious campaign against the Franks, assuring twenty years of peace along the Rhine frontier. He establishes his residence in Augusta Treverorum (modern Trier), capital of Germania.
- Licinius reneges on the religious freedom promised by the Edict of Milan, and begins a new persecution of Christians in the Eastern Roman Empire. He imprisons Christians, confiscates their properties and destroys churches.
Asia
- King Chandragupta I founds the Gupta dynasty in northern India.
- Zhang Shi (張寔), Zhang Duke of Xiping and governor of Liang Province, (涼州)is assassinated by Yan She (閻涉) and Zhao Ang (趙卬) and replaced by Zhang Mao (張茂), commonly accepted first ruler of the Chinese state Former Liang.
By topic
Art
- Construction begins on the Old St. Peter's Basilica, Rome (approximate date).
Culture and Religion
- In Nydam Mose (Denmark), the Nydam oak boat is sacrificed by the Danes (The boat is excavated in the 1830s, when a local farmer finds weapons including swords and spears).
- December 25 is introduced as the birthday of Jesus.
Science
- October 18 – Pappus of Alexandria, Greek philosopher, observes an eclipse of the sun and writes a commentary on The Great Astronomer (Almagest).
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Significant people
Births
- Flavius Valentinianus, better known as Valentinian I. Born in 321, he would eventually become a Roman emperor.
- Flavius Iulius Constans, better known as Constans. Born c. 323, he would eventually become a Roman emperor.
- Flavius Iulius Valens, better known as Valens. Born in 328, he would eventually become a Roman emperor.
- Aurelius Victor, Roman politician and historian.
Deaths
- Licinius, Roman emperor. Died in 325, executed. He had been deposed following his defeat in the Battle of Chrysopolis (324), and was later accused of conspiring to regain his throne.
- Martinian, Roman emperor. Died in 325, executed. He has been deposed following the Battle of Chrysopolis (324).