320

This article is about the year 320. For the aircraft, see Airbus A320.

Millennium:	1st millennium
Centuries:	3rd century 4th century 5th century
Decades:	300s 310s 320s 330s 340s
Years:	317 318 319 320 321 322 323

320 in various calendars

Gregorian calendar	320 CCCXX
Ab urbe condita	1073
Assyrian calendar	5070
Balinese saka calendar	241–242
Bengali calendar	−273
Berber calendar	1270
Buddhist calendar	864
Burmese calendar	−318
Byzantine calendar	5828–5829
Chinese calendar	己卯年 (Earth Rabbit) 3017 or 2810     — to — 庚辰年 (Metal Dragon) 3018 or 2811
Coptic calendar	36–37
Discordian calendar	1486
Ethiopian calendar	312–313
Hebrew calendar	4080–4081
Hindu calendars
- Vikram Samvat	376–377
- Shaka Samvat	241–242
- Kali Yuga	3420–3421
Holocene calendar	10320
Iranian calendar	302 BP – 301 BP
Islamic calendar	311 BH – 310 BH
Javanese calendar	201–202
Julian calendar	320 CCCXX
Korean calendar	2653
Minguo calendar	1592 before ROC 民前1592年
Nanakshahi calendar	−1148
Seleucid era	631/632 AG
Thai solar calendar	862–863
Tibetan calendar	阴土兔年 (female Earth-Rabbit) 446 or 65 or −707     — to — 阳金龙年 (male Iron-Dragon) 447 or 66 or −706

The Nydam oak boat at Gottorf Castle, Schleswig, (Germany)

Year 320 (CCCXX) was a leap year starting on Friday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Constantinus and Constantinus (or, less frequently, year 1073 Ab urbe condita). The denomination 320 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.

Events

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 established his residence in Augusta Treverorum (modern Trier), capital of Germania.
• Licinius reneged on the religious freedom promised by the Edict of Milan, and begins a new persecution of Christians in the Eastern Roman Empire. He confiscates their property by destroying churches and imprisoned Christians.

Asia

• King Chandragupta I founds the Gupta dynasty in northern India.
• The Huns appear in Persia.

By topic

Art

• Old St. Peter's Basilica, Rome, is started to be built (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).

Births

• Aurelius Victor, historian and politician (approximate date)
• Constans I, Roman emperor (d. 350)
• Flavian I, Patriarch of Antioch (d. 404)
• Jin Jianwendi, emperor of the Jin Dynasty (d. 372)
• Oribasius, Greek physician (approximate date)
• Tuoba Shiyijian, prince of the Tuoba Dai (d. 376)
• Xie An, statesman of the Jin Dynasty (d. 385)

Deaths

• Lactantius, Christian writer (approximate date)
• Sima Bao, prince of the Jin Dynasty (b. 294)