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Haymarket affair

CTL-E-0029 · Event

VERIFIED evidence grade — master store (canonical CSV)

Combined Graph record U-00572 · provenance: canonical master store (CSV), record CTL-E-0029. Master record source: CTL seed 2026-10-16 — UNVERIFIED, verify before public citation.

Labor rally bombing; May Day origins

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Labor rally bombing; May Day origins

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Evidence note (master store)

On the evening of May 4, 1886, a crowd gathered at Haymarket on Des Plaines Street just north of Randolph in Chicago; a bomb was hurled at police, one officer was killed instantly and eight officers died in total (Chicago History Museum, tier 1).

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Record CTL-E-0029 · Combined Graph record U-00572 · CultureTechLens Knowledge Graph · 1 source.
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Researched and maintained by the CultureTechLens research program · CultureTechLens Combined Graph, Release 2026-11-04. Corrections are public: the corrections log.

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Cite as: CultureTechLens, “Haymarket affair (CTL-E-0029),” CultureTechLens Combined Graph, Release 2026-11-04. https://culturetechlens.com/graph/entities/ctl-e-0029-u-00572/

Chicago: CultureTechLens. “Haymarket affair (CTL-E-0029).” CultureTechLens Combined Graph. Chicago, IL: CultureTechLens, 2026. https://culturetechlens.com/graph/entities/ctl-e-0029-u-00572/
APA: CultureTechLens. (2026). Haymarket affair (CTL-E-0029) [Entity record]. CultureTechLens Combined Graph. https://culturetechlens.com/graph/entities/ctl-e-0029-u-00572/
MLA: CultureTechLens. “Haymarket affair (CTL-E-0029).” CultureTechLens Combined Graph, 2026, https://culturetechlens.com/graph/entities/ctl-e-0029-u-00572/

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The DuSable Black History Museum’s Harold Washington Wing, Chicago — CultureTechLens
The DuSable Black History Museum’s Harold Washington Wing, Chicago — CultureTechLensPhoto: TonyTheTiger, CC BY-SA 3.0, via Wikimedia Commons
Re-dedication ceremony at the Victory Monument, 35th Street and King Drive, Chicago — CultureTechLens
Re-dedication ceremony at the Victory Monument, 35th Street and King Drive, Chicago — CultureTechLensPhoto: Lt. Col. Bradford Leighton, Illinois National Guard (public domain), via Wikimedia Commons
Roberts Temple Church of God in Christ, Bronzeville, Chicago — CultureTechLens
Roberts Temple Church of God in Christ, Bronzeville, Chicago — CultureTechLensPhoto: Legimet, CC BY-SA 4.0, via Wikimedia Commons

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