The Library of Congress was founded in 1800.
Notes on verification
Confirmed by multiple independent, high-quality sources including the Library of Congress itself, Wikipedia, and History.com, all agreeing on the 1800 founding date. [cascade flags: wikipedia_dropped_other_sources_exist | tier=silver indep_score=0.925 clusters=2 claim_tier=everyday]
Sources
- Library of Congress (seed:culture_and_philosophy)
- https://www.history.com/this-day-in-history/april-24/library-of-congress-established (corroboration)
- https://www.loc.gov (corroboration)