Beer Atlas · place
Time Cellar · style or market emergence
Porter emerges in early-18th-century London
Porter emerged in London in the early eighteenth century and became associated with expanding urban brewery scale.
Chronology
What date is actually being claimed
c. 1720s CE · precision: year range · approximate · A decade-scale navigation range avoids false precision around the style’s emergence.
Claim boundary
BEU explicitly rejects the neat single-inventor “Harwood invented porter in 1722 from three threads” story as established fact; the origin narrative is historiographically disputed.
Historical context
Places, participants, and period
These are identity links, not automatic claims that a place/person caused every downstream development.
Cross-world history graph
What this anchor helps contextualize
“Historically connected to” supplies sourced discovery context without asserting simple causation or lineage.
No cross-world history edge is asserted yet.
Evidence claims
Where interpretation is explicitly recorded
historical fact · 82% confidence
origin_story
Evidence and provenance attached to this claim record.
Provenance
Sources and reuse status
Source authority and asset reuse rights are separate questions. Citation does not grant permission to reproduce an image or text.
Tier B · reputable secondary
Porter Myths and Mysteries
Brewery History Society
Reuse: citation only
Tier A · scholarly primary
Industrial brewing in early modern London
Urban History / Cambridge University Press
Reuse: citation only
Graph discovery · explainable
Explore outward from this node
Ranked by a transparent navigation heuristic, never by quality, taste, popularity, authority, or commercial value.
historical era
Industrial & Scientific Brewing
A lens for the expansion of brewing scale, standardized measurement, fermentation science, and industrial production.
Navigation heuristic: 38. semantic 16 + evidence 4 + verification 6 + confidence 6 + cross-type 3 + route 3 + extra-relations 0
occurred_during · forward
Porter emerges in early-18th-century London — occurred during → Industrial & Scientific Brewing.
Historical event falls within an era. BEU places this anchor inside the scoped industrial scientific brewing navigation era.
Evidence: Porter Myths and Mysteries
place
London
City used for early modern commercial brewing and porter-emergence anchors.
Navigation heuristic: 38. semantic 16 + evidence 4 + verification 6 + confidence 6 + cross-type 3 + route 3 + extra-relations 0
occurred_in · forward
Porter emerges in early-18th-century London — occurred in → London.
Historical event occurred in a place. Location context for porter emergence london.
Evidence: Porter Myths and Mysteries