The Octagon House — designed by William Thornton [FACT-1430].
Location: Foggy Bottom, Washington, District of Columbia, United States
Verified facts
- Designed by William Thornton
confidence 70/100 · 2 independent sources · SRC-1400, SRC-1399
Evidence & sources
- SRC-1399 — Architects Foundation — The Octagon | History (Tier 1, official_site; retrieved June 2026)
- SRC-1400 — National Register of Historic Places / NHL Inventory–Nomination Form — Colonel John Tayloe House (The Octagon) (Tier 1, official_archive; retrieved June 2026)
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 publish
location only at neighborhood/city granularity — exact street addresses and personal information
are structurally barred from publication. Last reviewed June 2026.