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Millennium: 1st millennium
Centuries: 4th century5th century6th century
Decades: 370s  380s  390s  – 400s –  410s  420s  430s
Years: 398 399 400401402 403 404

401 (CDI) was a common year starting on Tuesday in the Julian calendar.

Events[change | change source]


for more information, see Category:401 deaths.