400s
From Wikipedia, the free encyclopedia
| 300s · 400s · 500s |
|---|
| Decades of the 400s: |
| 400–409 · 410s · 420s · 430s · 440s · 450s · 460s · 470s · 480s · 490s |
400s may refer to:
- The period from 400 to 499, almost synonymous with the 5th century (401–500)
- The period from 400 to 409, known as the 400s decade
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