Johannes Praetorius

German astronomer and mathematician (1537-1616)
Person human Q91661
Johannes Praetorius
Wolfgang Philipp Kilian · Public Domain · Wikimedia
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Summary

Johannes Praetorius was born on January 1, 1537[1], in Jáchymov[2]. He died on October 27, 1616[3], in Altdorf bei Nürnberg[4]. He worked as a mathematician[5], astronomer[6], university teacher[7], and physicist[8]. He ranks in the top 0.73% of human entities by monthly Wikipedia readership (51 views/month, #7,297 of 1,000,298).[9]

Key Facts

  • Country of citizenship: Germany[10]
  • Field of work: astronomy[11]
  • Employer: University of Altdorf[12], University of Wittenberg[13]
  • Educated at: University of Wittenberg[14]
  • Student: Petrus Saxonius[15], Daniel Schwenter[16], Johann Odontius[17]
  • Religion or worldview: Lutheranism[18]
  • Sex or gender: male[19]
  • Commons category: Johannes Praetorius[20]
  • Archives at: Bavarian State Library[21]
  • Family name: Praetorius[22]
  • Given name: Johannes[23]
  • Student of: Caspar Peucer[24], Sebastian Theodoricus[25]
  • Described by source: Allgemeine Deutsche Biographie[26], Otto's encyclopedia[27]
  • Languages spoken, written or signed: German[28]
  • On focus list of Wikimedia project: WikiProject PCC Wikidata Pilot/Smithsonian Libraries Dibner Library portraits[29]
  • Has works in the collection: Mathematisch-Physikalischer Salon[30]
  • Copyright status as a creator: copyrights on works have expired[31]
  • P14608: 119169002[32]

Why It Matters

Johannes Praetorius has Wikipedia articles in 9 language editions, a strong signal of global cultural recognition.[33] He is known by 12 alternative names across languages and contexts.[34]

FAQs

Where was Johannes Praetorius born?

Johannes Praetorius was born in Jáchymov[2].

Where did Johannes Praetorius die?

Johannes Praetorius died in Altdorf bei Nürnberg[4].

What did Johannes Praetorius do for work?

Johannes Praetorius worked as a mathematician[5], astronomer[6], university teacher[7], and physicist[8].

Where did Johannes Praetorius go to school?

Johannes Praetorius was educated at University of Wittenberg[14].

References

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

Direct Wikidata claims

  1. [2] ↑ . The Fine Art Archive. Retrieved . cs.isabart.org. Provenance: wikidata.org.
  2. [4] ↑ . wikidata.org.
  3. [19] ↑ . Integrated Authority File. Retrieved . wikidata.org.
  4. [10] ↑ . wikidata.org.
  5. [14] ↑ . Corpus Inscriptorum Vitebergense. civ-online.org. Provenance: wikidata.org.
  6. [11] ↑ . wikidata.org.
  7. [5] ↑ . The Fine Art Archive. Retrieved . cs.isabart.org. Provenance: wikidata.org.
  8. [6] ↑ . The Fine Art Archive. Retrieved . cs.isabart.org. Provenance: wikidata.org.
  9. [7] ↑ . wikidata.org.
  10. [8] ↑ . Retrieved . wikidata.org.
  11. [12] ↑ . wikidata.org.
  12. [13] ↑ . Retrieved . wikidata.org.
  13. [18] ↑ . wikidata.org.
  14. [20] ↑ . wikidata.org.
  15. [21] ↑ . kalliope-verbund.info. kalliope-verbund.info. Provenance: wikidata.org.
  16. [1] ↑ . wikidata.org.
  17. [3] ↑ . SNAC. Retrieved . cs.isabart.org. Provenance: wikidata.org.
  18. [22] ↑ . wikidata.org.
  19. [23] ↑ . wikidata.org.
  20. [15] ↑ . Mathematics Genealogy Project. wikidata.org.
  21. [16] ↑ . Mathematics Genealogy Project. wikidata.org.
  22. [17] ↑ . Mathematics Genealogy Project. wikidata.org.
  23. [24] ↑ . Mathematics Genealogy Project. wikidata.org.
  24. [25] ↑ . Mathematics Genealogy Project. wikidata.org.
  25. [26] ↑ . wikidata.org.
  26. [27] ↑ . wikidata.org.
  27. [28] ↑ . wikidata.org.
  28. [29] ↑ . wikidata.org.
  29. [30] ↑ . Retrieved . wikidata.org.
  30. [31] ↑ . Retrieved . wikidata.org.
  31. [32] ↑ . wikidata.org.

Aggregate / graph-position facts

  1. [9] ↑ . Wikimedia Foundation. dumps.wikimedia.org.
  2. [33] ↑ . Wikidata sitelinks. wikidata.org.
  3. [34] ↑ . 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). Johannes Praetorius. Retrieved October 17, 2026, from https://4ort.xyz/entity/johannes-praetorius-q91661-2
MLA “Johannes Praetorius.” 4ort.xyz Knowledge Graph, 4ort.xyz, 17 Oct. 2026, https://4ort.xyz/entity/johannes-praetorius-q91661-2.
BibTeX @misc{4ortxyz_johannes-praetorius-q91661-2_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{Johannes Praetorius}}, year = {2026}, url = {https://4ort.xyz/entity/johannes-praetorius-q91661-2}, note = {Accessed: 2026-10-17}}
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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. 6d ago · Fernando Goncalves 1800 · 2026-10-14 view diff on Wikidata ↗
    Wikipedia title → Johannes Praetorius (mathematician)
    Religion or worldview → Lutheranism
    Wikipedia languages → ['arz', 'commons', 'cs', 'de', 'en', 'es', 'fr', 'ht', 'it', 'lb', 'pt', 'ru', '
    Claims rich → —
    "/* wbsetclaim-create:2||1 */ Religion or worldview: Lutheranism"
  2. 27d ago · Printstream · 2026-09-23 view diff on Wikidata ↗
    Sächsische biografie (gnd) id → 3196
    "/* wbeditentity-update:0| */ QuickStatements 3.0 [[:toollabs:qs-dev/batch/55956|batch #55956]]: migrate GND to own IDs"
  3. 5w ago · Printstream · 2026-09-11 view diff on Wikidata ↗
    Educated at → University of Wittenberg
    Sächsische biografie (gnd) id → 3196
    "/* wbcreateclaim-create:1| */ Sächsische biografie (gnd) id: 119169002, #quickstatements; #temporary_batch_1789158480789"
  4. 12w ago · Pierrotrgr · 2026-07-24 view diff on Wikidata ↗
    Biblissima authority id → North Channel
    "/* wbsetclaim-create:2||1 */ Biblissima authority id: Q424008, Import ID Biblissima V3 ([[:toollabs:editgroups/b/OR/a6710164cdc|details]])"
  5. 15w ago · Printstream · 2026-07-05 view diff on Wikidata ↗
    P14608 → 119169002
    "/* wbcreateclaim-create:1| */ P14608: 119169002, #quickstatements; #temporary_batch_1783130387391"
  6. 22w ago · Epìdosis · 2026-05-13 view diff on Wikidata ↗
    On focus list of wikimedia project → WikiProject PCC Wikidata Pilot/Smithsonian Libraries Dibner Library portraits
    Country of citizenship → Germany
    Student → Petrus Saxonius, Daniel Schwenter, Johann Odontius
    Languages spoken, written or signed → German
    + 22 other properties edited (see Wikidata diff for full list)
    "/* wbeditentity-update:0| */ QuickStatements 3.0 [[:toollabs:qs-dev/batch/30853|batch #30853]]: match CERL IDs on the basis of GND (8)"
Live feed via Wikidata EventStreams. New edits appear within minutes of being made on Wikidata.