Singer Castle — designed by Ernest Flagg [FACT-2297]; built in 1905 [FACT-2298].
Location: Thousand Islands, Hammond, New York, United States
Verified facts
- Designed by Ernest Flagg
confidence 70/100 · 2 independent sources · SRC-2116, SRC-2114 - Built in 1905
confidence 70/100 · 2 independent sources · SRC-2116, SRC-2114
Evidence & sources
- SRC-2114 — Historical Marker Database — Singer Castle on Dark Island (Tier 2, institutional_marker; retrieved June 2026)
- SRC-2116 — Singer Castle on Dark Island — Brief History (official site) (Tier 1, official_site; 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.