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21st millennium BC

millennium
Intangible Millennium Q3019840

Facts

4 properties
Instance of
millennium
Follows
22nd millennium BC[2]
Followed by
20th millennium BC[3]
Point in time
-21000-01-01T00:00:00Z[4]
🏷️ Also known as
en 21st millennium BC en 21st-millennium BC de 21. Jahrtausend v. Chr. fr XXIe millénaire av. J.-C. fr 21e millénaire av. J.-C. it XXI millennio a.C. it XXI millennio AC ja 紀元前21千年紀 nl 21e millennium v.Chr. ru 21-е тысячелетие до н. э. sv 20000-talet f.Kr. uk 21 тисячоліття до н. е. vi thiên niên kỉ 21 TCN vi thiên niên kỷ 21 TCN zh 公元前21千年 zh 公元前21千纪 zh 前21千年 zh 前21千纪
🔖 Identifiers · 1
Google Knowledge Graph ID
/g/122zk1vy

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Summary

21st millennium BC is a millennium[1].

References

Programmatic citations — every numbered marker resolves to a verifiable graph row below.

Direct Wikidata claims

  1. [2] ↑ . wikidata.org.
  2. [3] ↑ . wikidata.org.
  3. [4] ↑ . wikidata.org.

Class ancestry

  1. [1] ↑ . Wikidata. wikidata.org.

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Use these citations when quoting this entity in research, articles, AI prompts, or wherever provenance matters. We aggregate Wikidata + Wikipedia + authoritative open-data sources; the stitched, scored, cross-referenced view is what 4ort.xyz contributes.

APA 4ort.xyz Knowledge Graph. (2026). 21st millennium BC. Retrieved November 9, 2026, from https://4ort.xyz/entity/21st-millennium-bc
MLA “21st millennium BC.” 4ort.xyz Knowledge Graph, 4ort.xyz, 9 Nov. 2026, https://4ort.xyz/entity/21st-millennium-bc.
BibTeX @misc{4ortxyz_21st-millennium-bc_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{21st millennium BC}}, year = {2026}, url = {https://4ort.xyz/entity/21st-millennium-bc}, note = {Accessed: 2026-11-09}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): 21st millennium BC — https://4ort.xyz/entity/21st-millennium-bc (retrieved 2026-11-09)

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