200th anniversary: American surveyor James Thompson produced the first plat of Chicago for the...
History · Anniversaries · Sun, August 4, 2030
1830: American surveyor James Thompson produced the first plat of Chicago for the Illinois and Michigan Canal Commissioners.
Source, method and history
- Source
- Wikipedia
- How we know
- Wikipedia "On this day" selected anniversary, 200 years (1830 to 2030).
- Recurs
- annual
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- Changes
- 2026-09-25: added to 2030-08-04