Aktion T4

Nazi Germany's programme of euthanasia which claimed 275,000–300,000 victims
Intangible project Q154494
Aktion T4
Marcel (Photographer) Derivative work MagentaGreen · Public Domain · Wikimedia
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Aktion T4 was a program in Nazi Germany[1].

Key Facts

  • Country: Nazi Germany[3]
  • Named after: 4, Tiergartenstrasse[4]
  • Followed by: Action Brandt[5]
  • Subclass of: mass murder[6], involuntary euthanasia[7], war crime[8]
  • Child organization or unit: Gemeinnützige Krankentransport GmbH[9]
  • Part of: Nazi eugenics[10], Nazi executions of ill people[11]
  • Has use: deliberate murder[12]
  • Commons category: Aktion T4[13]
  • Start time: January 1, 1940[14], 1939[15]
  • End time: January 1, 1941[16]
  • Participant: Adolf Hitler[17], Viktor Brack[18], Hans Hefelmann[19], Leonardo Conti[20], Herbert Linden[21], Philipp Bouhler[22], Martin Bormann[23], Karl Brandt[24]
  • Topic's main category: Category:Aktion T4[25]
  • Number of deaths: 278,000[26]
  • Replaced by: Action 14f13[27]
  • Native label: Aktion T4[28]
  • On focus list of Wikimedia project: WikiProject Victims of National Socialism[29]

Why It Matters

Aktion T4 has Wikipedia articles in 29 language editions, a strong signal of global cultural recognition.[30] It is known by 88 alternative names across languages and contexts.[31]

References

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

Direct Wikidata claims

  1. [3] ↑ . Nuremberg Trials Project. nuremberg.law.harvard.edu. Provenance: wikidata.org.
  2. [4] ↑ . wikidata.org.
  3. [5] ↑ . Nuremberg Trials Project. nuremberg.law.harvard.edu. Provenance: wikidata.org.
  4. [6] ↑ . Nuremberg Trials Project. nuremberg.law.harvard.edu. Provenance: wikidata.org.
  5. [7] ↑ . Nuremberg Trials Project. nuremberg.law.harvard.edu. Provenance: wikidata.org.
  6. [8] ↑ . Nuremberg Trials Project. nuremberg.law.harvard.edu. Provenance: wikidata.org.
  7. [9] ↑ . timesofisrael.com. timesofisrael.com. Provenance: wikidata.org.
  8. [10] ↑ . wikidata.org.
  9. [11] ↑ . Nuremberg Trials Project. nuremberg.law.harvard.edu. Provenance: wikidata.org.
  10. [12] ↑ . Nuremberg Trials Project. nuremberg.law.harvard.edu. Provenance: wikidata.org.
  11. [13] ↑ . wikidata.org.
  12. [14] ↑ . wikidata.org.
  13. [15] ↑ . Nuremberg Trials Project. nuremberg.law.harvard.edu. Provenance: wikidata.org.
  14. [16] ↑ . Nuremberg Trials Project. nuremberg.law.harvard.edu. Provenance: wikidata.org.
  15. [17] ↑ . Nuremberg Trials Project. nuremberg.law.harvard.edu. Provenance: wikidata.org.
  16. [18] ↑ . Nuremberg Trials Project. nuremberg.law.harvard.edu. Provenance: wikidata.org.
  17. [19] ↑ . Nuremberg Trials Project. nuremberg.law.harvard.edu. Provenance: wikidata.org.
  18. [20] ↑ . Nuremberg Trials Project. nuremberg.law.harvard.edu. Provenance: wikidata.org.
  19. [21] ↑ . Nuremberg Trials Project. nuremberg.law.harvard.edu. Provenance: wikidata.org.
  20. [22] ↑ . Nuremberg Trials Project. nuremberg.law.harvard.edu. Provenance: wikidata.org.
  21. [23] ↑ . Nuremberg Trials Project. nuremberg.law.harvard.edu. Provenance: wikidata.org.
  22. [24] ↑ . Retrieved . wikidata.org.
  23. [25] ↑ . wikidata.org.
  24. [26] ↑ . stiftung-denkmal.de. stiftung-denkmal.de. Provenance: wikidata.org.
  25. [27] ↑ . wikidata.org.
  26. [28] ↑ . wikidata.org.
  27. [29] ↑ . wikidata.org.

Class ancestry

  1. [1] ↑ . Wikidata. wikidata.org.

Aggregate / graph-position facts

  1. [2] ↑ . Wikimedia Foundation. dumps.wikimedia.org.
  2. [30] ↑ . Wikidata sitelinks. wikidata.org.
  3. [31] ↑ . 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). Aktion T4. Retrieved October 17, 2026, from https://4ort.xyz/entity/aktion-t4
MLA “Aktion T4.” 4ort.xyz Knowledge Graph, 4ort.xyz, 17 Oct. 2026, https://4ort.xyz/entity/aktion-t4.
BibTeX @misc{4ortxyz_aktion-t4_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{Aktion T4}}, year = {2026}, url = {https://4ort.xyz/entity/aktion-t4}, note = {Accessed: 2026-10-17}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): Aktion T4 — https://4ort.xyz/entity/aktion-t4 (retrieved 2026-10-17)

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