# Cambridge 400 (Cambridge400.com)

> Newtowne to Cambridge: four centuries on the north bank. A civic anniversary edition connecting Cambridge’s old meeting ground, neighborhoods, institutions, and changing ideas of the future.

This site is part of The Civic Graph, a History Is For Everyone project
for the Boston/Cambridge region. Every page below is a canonical entity record with
a stable ID, structured facts, source provenance, and Schema.org markup. Public
connections retain their typed predicates when both endpoints clear review.
Summaries are designed to be extractable and citable.

## Cities

- [Cambridge](https://cambridge400.com/e/cambridge): Founded as Newtowne in 1630 and renamed Cambridge in 1638, the city grew around Harvard, industry, and later research institutions. [API: /api/v1/entity/cambridge; 11 public relationships]

## Universities

- [Massachusetts Institute of Technology](https://cambridge400.com/e/mit): The Massachusetts Institute of Technology was incorporated in Boston in 1861 and moved across the Charles River to Cambridge in 1916. Its campus now occupies 168 acres along the Cambridge side of the Charles River Basin. [API: /api/v1/entity/mit; 0 public relationships; sameAs: https://www.wikidata.org/entity/Q49108, https://en.wikipedia.org/?curid=18879, https://mit.edu]

## Neighborhoods

- [Harvard Square](https://cambridge400.com/e/harvard-square): At the meeting of town and university, Harvard Square has long combined transportation, commerce, civic institutions, and Harvard Yard around a mixed-use center. [API: /api/v1/entity/harvard-square; 6 public relationships; sameAs: https://www.openstreetmap.org/node/2448023622, https://www.wikidata.org/entity/Q1587858, https://en.wikipedia.org/?curid=593247]
- [East Cambridge](https://cambridge400.com/e/east-cambridge): East Cambridge combines a longstanding retail corridor along Cambridge Street with residential blocks and a redeveloped riverfront stretching toward Lechmere and Kendall Square. [API: /api/v1/entity/east-cambridge; 1 public relationships]

## Historical events

- [Founding of Newtowne (1630)](https://cambridge400.com/e/founding-cambridge-1630): The site for Newtowne was selected on December 21, 1630, and the settlement was named on December 28; its grid was laid out the following spring. [API: /api/v1/entity/founding-cambridge-1630; 3 public relationships]
- [Washington Takes Command (1775)](https://cambridge400.com/e/washington-command-1775): George Washington arrived in Cambridge on July 2, 1775 and took command from Artemas Ward that evening, beginning the work of organizing the Continental Army during the siege of Boston. [API: /api/v1/entity/washington-command-1775; 2 public relationships]
- [Newtowne Becomes Cambridge (1638)](https://cambridge400.com/e/newtowne-renamed-1638): On May 2, 1638, the settlement founded as Newtowne in 1630 was formally renamed Cambridge, establishing the name the city still uses today. [API: /api/v1/entity/newtowne-renamed-1638; 2 public relationships]

## Landmarks

- [Longfellow House–Washington’s Headquarters](https://cambridge400.com/e/longfellow-house-hq): Built in 1759, the house served as George Washington's headquarters from July 1775 to April 1776 and later as Henry Wadsworth Longfellow's home. [API: /api/v1/entity/longfellow-house-hq; 2 public relationships; sameAs: https://www.nps.gov/long]

## Canonical API (cite these)

- /api/v1/entity/{id}: the complete canonical record — facts, location, provenance, relationships, sameAs, AI summary
- /api/v1/search?q=QUERY&page=1&limit=20: paginated search across the reviewed public corpus
- /api/graph/related/{id}: graph-ranked related entities
- /api-discovery.json: machine-readable index of every endpoint and dataset

## How to cite

Attribute graph structure to "The Civic Graph" (CC BY 4.0) and retain each record's
underlying provenance and media rights. Each record carries a confidence score and may
include owl:sameAs links to Wikidata, Wikipedia, or OpenStreetMap for reconciliation.