400

Summary

400 is a year^[1]. 400 ranks in the top 4% of year entities by monthly Wikipedia readership (29 views/month).^[2]

Key Facts

• 400's instance of is recorded as year^[3].
• 400's follows is recorded as 399^[4].
• 400's followed by is recorded as 401^[5].
• 400's part of is recorded as 400s^[6].
• 400's Commons category is recorded as 400^[7].
• 400's point in time is recorded as +0400-01-01T00:00:00Z^[8].
• 400's topic's main category is recorded as Category:400^[9].
• 400's Commons gallery is recorded as 400^[10].
• 400's has list is recorded as list of state leaders in 400^[11].
• 400's permanent duplicated item is recorded as Q31800118^[12].
• 400's Yle topic ID is recorded as 18-306043^[13].
• 400's Cathopedia article ID is recorded as 400^[14].
• 400's category for births in this time period is recorded as Category:400 births^[15].
• 400's category for deaths in this time period is recorded as Category:400 deaths^[16].

Why It Matters

400 ranks in the top 4% of year entities by monthly Wikipedia readership (29 views/month).^[2] 400 has Wikipedia articles in 29 language editions, a strong signal of global cultural recognition.^[17] 400 is known by 3 alternative names across languages and contexts.^[18]