Older Than deck / Buildings and landmarks
Washington Monument
Completed
1884
Completed when its capstone was set; it was dedicated the following year.
Sources and checks
Checked 2026-10-21: Researched by Codex (two independent publishers, verbatim quotes); every counted quote re-found on its page by the server check (content-verify); scope and plausibility reviewed by Claude (AI build agent). Quotes are short passages from each source; for dates the quote is the year as printed, read in context.
“1884”U.S. National Park Service: source, retrieved 2026-10-21; server could not read it (403); not found by Codex
“1884”Store norske leksikon: source, retrieved 2026-10-21; quote re-found by the server check
“1884”US Army Corps of Engineers — Office of History: source, retrieved 2026-10-21; server could not read it (403); not found by Codex
“1884”US National Park Service: source, retrieved 2026-10-21; quote re-found by the server check
“1884”Destination DC: source, retrieved 2026-10-21; quote re-found by the server check
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