Longfellow House–Washington's Headquarters National Historic Site is a Georgian house in Cambridge, Massachusetts. Built in 1759, and is a National Historic Landmark.
Location: Cambridge, Massachusetts, United States
Verified facts
- Located in Cambridge
confidence 75/100 · 3 independent sources · SRC-1454, SRC-1455, SRC-1456, SRC-3761 - Built in 1759
confidence 75/100 · 3 independent sources · SRC-1457, SRC-1455, SRC-1456, SRC-3761 - Architectural style: Georgian
confidence 75/100 · 3 independent sources · SRC-1457, SRC-1456, SRC-3366 - Historic designation: National Historic Landmark; National Historic Site; National Register of Historic Places
confidence 75/100 · 3 independent sources · SRC-1455, SRC-1456, SRC-3367
Evidence & sources
- SRC-1454 — National Park Service — Longfellow House Washington's Headquarters National Historic Site (park home page) (Tier 1, official_archive; retrieved June 2026)
- SRC-1455 — National Park Service — Longfellow House – Washington's Headquarters (Places listing) (Tier 1, official_archive; retrieved June 2026)
- SRC-1456 — Wikipedia — Longfellow House–Washington's Headquarters National Historic Site (Tier 3, encyclopedia; retrieved June 2026)
- SRC-1457 — National Park Service — Longfellow House Washington's Headquarters NHS, Architecture (Tier 1, official_archive; retrieved June 2026)
- SRC-3366 — History Cambridge — Vassall-Craigie-Longfellow House (Tier 2, historical_society; retrieved June 2026)
- SRC-3367 — The Cultural Landscape Foundation — Longfellow House-Washington's Headquarters National Historic Site (Tier 2, heritage_organization; retrieved June 2026)
- SRC-3761 — britannica.com (Tier 2, journalism; retrieved June 2026)
Photos
How we verify
Every fact above is independently corroborated by at least two reputable sources and
confidence-scored before publication. Claims that cannot clear that bar are withheld. We show the
street address only for non-residential public landmarks (museums, commercial and civic buildings,
publicly documented filming-location sites); the exact addresses of private residences and any
personal information are structurally barred from publication. Last reviewed June 2026.