Decades: 350s 360s 370s 380s 390s - 400s - 410s 420s 430s 440s 450s

Years: 400 401 402 403 404 - 405 - 406 407 408 409 410

• Japanese court officially adopts the Chinese writing system (approximate date).
• Emperor Honorius closes the Colosseum.
• Saint Jerome publishes the Vulgate Bible.
• The Armenian alphabet is invented.

• Ricimer, de facto ruler of the West Roman Empire
• Salvian, Christian writer (approximate date)

• November 11 - Arsacius of Tarsus, intruding archbishop of Constantinople
• Moses the Black, Egyptian monk
• Theon of Alexandria, last director of the Library of Alexandria