Klaus Mertens

German singer
Person human Q1745437
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Summary

Klaus Mertens is a human[1]. He was born in Kleve[2]. He was born on March 25, 1949[3]. He worked as an opera singer[4]. He ranks in the top 0.73% of human entities by monthly Wikipedia readership (43 views/month, #7,300 of 1,000,298).[5]

Key Facts

  • Klaus Mertens's place of birth was Kleve[2].
  • Klaus Mertens was born on March 25, 1949[3].
  • Klaus Mertens held citizenship in Germany[6].
  • Klaus Mertens's professions included opera singer[4].
  • Klaus Mertens was a member of European Academy of Sciences and Arts[7].
  • Klaus Mertens is recorded as male[8].
  • Klaus Mertens's instance of is recorded as human[9].
  • Klaus Mertens's voice type is recorded as bass[10].
  • Klaus Mertens's voice type is recorded as bass-baritone[11].
  • Klaus Mertens's given name is recorded as Klaus[12].
  • Klaus Mertens's official website is recorded as https://www.klausmertens.eu/[13].
  • Klaus Mertens studied under Jakob Stämpfli[14].
  • Klaus Mertens studied under Peter Maßmann[15].
  • Klaus Mertens's instrument is recorded as voice[16].
  • Klaus Mertens's languages spoken, written or signed is recorded as German[17].

Product Details

The following facts are restated verbatim from public-domain and CC0 open-data sources — every line is independently verifiable against the named source's catalog.

MusicBrainz — CC0 open music encyclopedia

  • Type: Person[18]

  • Country: DE[19]

  • Began / founded: 1949-03-25[20]

  • Genre(s): classical[21]

  • Community tags: bass-baritone, classical, german bass-baritone[22]

  • MusicBrainz ID: 3c632301-55e9-4ffc-959d-1e01d04e3c51[23]

Body

Origins and Family

Born in Kleve[2], Klaus Mertens… he was born on March 25, 1949[3].

Education

Studied under Jakob Stämpfli[14], an opera singer[24], 1934–2014[25], of Switzerland[26], specialised in music[27] and Peter Maßmann[15], a theatrical director[28], 1916–2000[29].

Career and Affiliations

Klaus Mertens worked as an opera singer[4].

Why It Matters

Klaus Mertens ranks in the top 0.73% of human entities by monthly Wikipedia readership (43 views/month, #7,300 of 1,000,298).[5]

FAQs

Where was Klaus Mertens born?

Klaus Mertens was born in Kleve[2].

What did Klaus Mertens do for work?

Klaus Mertens worked as opera singer[4].

References

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

Direct Wikidata claims

  1. [2] ↑ . Integrated Authority File. Retrieved . wikidata.org.
  2. [8] ↑ . BnF authorities. Retrieved . wikidata.org.
  3. [6] ↑ . wikidata.org.
  4. [9] ↑ . BnF authorities. Retrieved . wikidata.org.
  5. [4] ↑ . wikidata.org.
  6. [10] ↑ . wikidata.org.
  7. [11] ↑ . wikidata.org.
  8. [7] ↑ . wikidata.org.
  9. [3] ↑ . Integrated Authority File. Retrieved . wikidata.org.
  10. [12] ↑ . wikidata.org.
  11. [13] ↑ . wikidata.org.
  12. [14] ↑ . wikidata.org.
  13. [15] ↑ . wikidata.org.
  14. [16] ↑ . wikidata.org.
  15. [17] ↑ . wikidata.org.

Product details (FDA / USDA / NHTSA public-domain catalog data)

  1. [18] ↑ . MusicBrainz (MetaBrainz Foundation). musicbrainz.org.
  2. [19] ↑ . MusicBrainz (MetaBrainz Foundation). musicbrainz.org.
  3. [20] ↑ . MusicBrainz (MetaBrainz Foundation). musicbrainz.org.
  4. [21] ↑ . MusicBrainz (MetaBrainz Foundation). musicbrainz.org.
  5. [22] ↑ . MusicBrainz (MetaBrainz Foundation). musicbrainz.org.
  6. [23] ↑ . MusicBrainz (MetaBrainz Foundation). musicbrainz.org.

Inline context (facts about related entities)

  1. [24] ↑ . Wikidata. wikidata.org. → on this site
  2. [25] ↑ . Wikidata. wikidata.org. → on this site
  3. [26] ↑ . Wikidata. wikidata.org. → on this site
  4. [27] ↑ . Wikidata. wikidata.org. → on this site
  5. [28] ↑ . Wikidata. wikidata.org. → on this site
  6. [29] ↑ . Wikidata. wikidata.org. → on this site

Class ancestry

  1. [1] ↑ . Wikidata. wikidata.org.

Aggregate / graph-position facts

  1. [5] ↑ . Wikimedia Foundation. dumps.wikimedia.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). Klaus Mertens. Retrieved October 17, 2026, from https://4ort.xyz/entity/klaus-mertens-q1745437
MLA “Klaus Mertens.” 4ort.xyz Knowledge Graph, 4ort.xyz, 17 Oct. 2026, https://4ort.xyz/entity/klaus-mertens-q1745437.
BibTeX @misc{4ortxyz_klaus-mertens-q1745437_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{Klaus Mertens}}, year = {2026}, url = {https://4ort.xyz/entity/klaus-mertens-q1745437}, note = {Accessed: 2026-10-17}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): Klaus Mertens — https://4ort.xyz/entity/klaus-mertens-q1745437 (retrieved 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. 22w ago · Epìdosis · 2026-05-19 view diff on Wikidata ↗
    Instrument → voice
    Place of birth → Kleve
    Freebase id → /m/09v3vf4
    Library of congress authority id → n91070536
    + 40 other properties edited (see Wikidata diff for full list)
    "/* wbeditentity-update:0| */ QuickStatements 3.0 [[:toollabs:qs-dev/batch/31727|batch #31727]]: import P21 and P106 from GND (20)"
Live feed via Wikidata EventStreams. New edits appear within minutes of being made on Wikidata.