# Cambridge 400 (Cambridge400.com)

> Newtowne to Cambridge: 400 years on the north bank. Sister property to Boston400 — shares editorial workflows and the same historical entity spine.

This site is part of The Civic Graph — canonical civic intelligence infrastructure
for the Boston/Cambridge region. Every page below is a canonical entity record with
stable ID, structured facts, typed relationships, source provenance and Schema.org markup.
Summaries are designed to be extractable and citable.

## Neighborhoods

- [Harvard Square](/cambridge400/e/harvard-square): Harvard University's front door: independent bookstores, family-run jewelers, and cafes in the brick blocks around the Harvard Red Line stop, on ground that has been Cambridge's center since the 1630s. [canonical: /api/v1/entity/harvard-square; 451 relationships; sameAs: https://www.openstreetmap.org/node/2448023622, https://www.wikidata.org/entity/Q1587858, https://en.wikipedia.org/?curid=593247]
- [East Cambridge](/cambridge400/e/east-cambridge): CambridgeSide, waterfront restaurants facing the Boston skyline, and a five-floor antique market. Retail, dining, and residential blocks around the Lechmere Green Line stop. [canonical: /api/v1/entity/east-cambridge; 56 relationships]

## Canonical API (cite these)

- /api/v1/entity/{id}: the complete canonical record — facts, location, provenance, relationships, sameAs, AI summary
- /api/v1/search?q=QUERY: ranked entity search with influence scores
- /api/graph/related/{id}: graph-ranked related entities
- /api-discovery.json: machine-readable index of every endpoint and dataset

## How to cite

Attribute "The Civic Graph" (CC BY 4.0). Each record carries a confidence score and
owl:sameAs links to Wikidata, Wikipedia and OpenStreetMap for reconciliation.