Siam

These are real dates: Siam's founding is recorded in Wikidata, and accepted here only because they agree with the centuries the atlas independently drew it in. Wikidata records more than one founding date; the earliest is shown. No dissolution is recorded, so the closing year below is still the last century the atlas drew — not when it ended. The atlas itself draws the world at 2 moments in time, not continuously. The strip below covers those snapshots — 1800 CE to 1938 CE — which sits inside the fuller span above.