Casimir I, Duke of Cieszyn

noble
Person human Q689157
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Casimir I, Duke of Cieszyn

Summary

Casimir I, Duke of Cieszyn is a human[1]. He was born in Cieszyn[2]. He was born on 1280[3]. He died on January 1, 1358[4]. He worked as an aristocrat[5]. He ranks in the top 0.73% of human entities by monthly Wikipedia readership (17 views/month, #7,294 of 1,000,298).[6]

Key Facts

  • Casimir I, Duke of Cieszyn was born in Cieszyn[2].
  • Casimir I, Duke of Cieszyn was born on 1280[3].
  • Casimir I, Duke of Cieszyn was born on 1278[7].
  • Casimir I, Duke of Cieszyn died on January 1, 1358[4].
  • Casimir I, Duke of Cieszyn's father was Mieszko I, Duke of Cieszyn[8].
  • Casimir I, Duke of Cieszyn's mother was NN[9].
  • Casimir I, Duke of Cieszyn was married to Eufemia of Masovia[10].
  • A child of Casimir I, Duke of Cieszyn was Przemyslaus I Noszak, Duke of Cieszyn[11].
  • A child of Casimir I, Duke of Cieszyn was Anna of Cieszyn[12].
  • A child of Casimir I, Duke of Cieszyn was Władysław of Cieszyn[13].
  • A child of Casimir I, Duke of Cieszyn was Bolesław of Cieszyn[14].
  • A child of Casimir I, Duke of Cieszyn was Jan of Cieszyn[15].
  • A child of Casimir I, Duke of Cieszyn was Siemowit of Cieszyn[16].
  • Casimir I, Duke of Cieszyn held citizenship in Poland[17].
  • Casimir I, Duke of Cieszyn's professions included aristocrat[5].
  • Casimir I, Duke of Cieszyn's religion is recorded as Catholicism[18].
  • Casimir I, Duke of Cieszyn is recorded as male[19].
  • Casimir I, Duke of Cieszyn's instance of is recorded as human[20].
  • Casimir I, Duke of Cieszyn's family is recorded as Piasts of Teschen[21].
  • Casimir I, Duke of Cieszyn's family is recorded as Piasts of Silesia[22].
  • Casimir I, Duke of Cieszyn's noble title is recorded as duke[23].
  • Casimir I, Duke of Cieszyn's given name is recorded as Kasimir[24].
  • Casimir I, Duke of Cieszyn's described by source is recorded as Q19525392[25].
  • Casimir I, Duke of Cieszyn's languages spoken, written or signed is recorded as Polish[26].
  • Casimir I, Duke of Cieszyn's sibling is recorded as Władysław of Oświęcim[27].

Body

Origins and Family

Casimir I, Duke of Cieszyn's place of birth was Cieszyn[2]. Recorded date of birth include 1280[3] and 1278[7]. His father was Mieszko I, Duke of Cieszyn[8]. His mother was NN[9].

Career and Affiliations

Casimir I, Duke of Cieszyn worked as an aristocrat[5].

Personal Life

Among Casimir I, Duke of Cieszyn's spouses was Eufemia of Masovia[10]. Children include Przemyslaus I Noszak, Duke of Cieszyn[11], an aristocrat[28], 1334–1410[29], specialised in politics[30]; Anna of Cieszyn[12], 1350–1367[31]; Władysław of Cieszyn[13], an aristocrat[32], 1301–1355[33]; Bolesław of Cieszyn[14], a canon[34], 1330–1355[35]; Jan of Cieszyn[15], 1339–1359[36]; and Siemowit of Cieszyn[16], an aristocrat[37], 1340–1391[38]. His religion is recorded as Catholicism[18].

Death and Burial

Casimir I, Duke of Cieszyn died on January 1, 1358[4].

Why It Matters

Casimir I, Duke of Cieszyn ranks in the top 0.73% of human entities by monthly Wikipedia readership (17 views/month, #7,294 of 1,000,298).[6] He has Wikipedia articles in 11 language editions, a strong signal of global cultural recognition.[39] He is known by 4 alternative names across languages and contexts.[40]

FAQs

Where was Casimir I, Duke of Cieszyn born?

Casimir I, Duke of Cieszyn was born in Cieszyn[2].

Who were Casimir I, Duke of Cieszyn's parents?

Casimir I, Duke of Cieszyn's father was Mieszko I, Duke of Cieszyn[8]. Casimir I, Duke of Cieszyn's mother was NN[9].

Who was Casimir I, Duke of Cieszyn married to?

Casimir I, Duke of Cieszyn's spouses include Eufemia of Masovia[10].

What did Casimir I, Duke of Cieszyn do for work?

Casimir I, Duke of Cieszyn worked as aristocrat[5].

References

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

Direct Wikidata claims

  1. [2] . wikidata.org.
  2. [19] . Integrated Authority File. Retrieved . wikidata.org.
  3. [8] . wikidata.org.
  4. [9] . Genealogics. wikidata.org.
  5. [10] . wikidata.org.
  6. [17] . wikidata.org.
  7. [20] . wikidata.org.
  8. [11] . wikidata.org.
  9. [12] . wikidata.org.
  10. [13] . wikidata.org.
  11. [14] . wikidata.org.
  12. [15] . wikidata.org.
  13. [16] . wikidata.org.
  14. [21] . wikidata.org.
  15. [22] . wikidata.org.
  16. [23] . wikidata.org.
  17. [5] . wikidata.org.
  18. [18] . wikidata.org.
  19. [3] . wikidata.org.
  20. [7] . wikidata.org.
  21. [4] . wikidata.org.
  22. [24] . wikidata.org.
  23. [25] . wikidata.org.
  24. [26] . wikidata.org.
  25. [27] . wikidata.org.

Inline context (facts about related entities)

  1. [28] . Wikidata. wikidata.org. → on this site
  2. [29] . Wikidata. wikidata.org. → on this site
  3. [30] . Wikidata. wikidata.org. → on this site
  4. [31] . Wikidata. wikidata.org. → on this site
  5. [32] . Wikidata. wikidata.org. → on this site
  6. [33] . Wikidata. wikidata.org. → on this site
  7. [34] . Wikidata. wikidata.org. → on this site
  8. [35] . Wikidata. wikidata.org. → on this site
  9. [36] . Wikidata. wikidata.org. → on this site
  10. [37] . Wikidata. wikidata.org. → on this site
  11. [38] . Wikidata. wikidata.org. → on this site

Class ancestry

  1. [1] . Wikidata. wikidata.org.

Aggregate / graph-position facts

  1. [6] . Wikimedia Foundation. dumps.wikimedia.org.
  2. [39] . Wikidata sitelinks. wikidata.org.
  3. [40] . Wikidata aliases. wikidata.org.

📑 Cite this page

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). Casimir I, Duke of Cieszyn. Retrieved April 11, 2026, from https://4ort.xyz/entity/casimir-i-duke-of-cieszyn
MLA “Casimir I, Duke of Cieszyn.” 4ort.xyz Knowledge Graph, 4ort.xyz, 11 Apr. 2026, https://4ort.xyz/entity/casimir-i-duke-of-cieszyn.
BibTeX @misc{4ortxyz_casimir-i-duke-of-cieszyn_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{Casimir I, Duke of Cieszyn}}, year = {2026}, url = {https://4ort.xyz/entity/casimir-i-duke-of-cieszyn}, note = {Accessed: 2026-04-11}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): Casimir I, Duke of Cieszyn — https://4ort.xyz/entity/casimir-i-duke-of-cieszyn (retrieved 2026-04-11)

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Edit History

Rolling log of changes to this entity's Wikidata record. Values shown reflect the current state of each edited property — follow the history link to see the precise diff for any edit.

  1. 8w ago · Epìdosis · 2026-05-13 view diff on Wikidata ↗
    Occupation
    Family Piasts of Teschen, Piasts of Silesia
    Instance of
    Described by source Q19525392
    + 16 other properties edited (see Wikidata diff for full list)
    "/* wbeditentity-update:0| */ QuickStatements 3.0 [[:toollabs:qs-dev/batch/30851|batch #30851]]: match CERL IDs on the basis of GND (7)"
Live feed via Wikidata EventStreams. New edits appear within minutes of being made on Wikidata.