HistoryEarly 20th century acquisition; manuscript itself late 4th/early 5th centuryUnited Stateshigh confidence

Codex Washingtonianus is now held in the Freer Gallery of Art.

Notes on verification

Confirmed by Wikipedia, National Geographic, and the Smithsonian's own catalog page with accession number, providing strong independent corroboration. [cascade flags: wikipedia_dropped_other_sources_exist | tier=silver indep_score=0.875 clusters=2 claim_tier=everyday]

Sources