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Formation of Canton Aargau

When
1803
Where
Aargau
Part of
Aargau becomes a Swiss canton

The canton of Aargau was formed in 1803 by combining the Helvetic cantons of Aargau, Baden, and Fricktal.

The contemporary canton of Aargau was formed in 1803 as a canton of the Swiss Confederation under the Act of Mediation. It combined three short-lived cantons of the Helvetic Republic: Aargau (1798–1803), Baden (1798–1803), and Fricktal (1802–1803). The passages date the formation to 1803 without a specific day.

Sources

  1. Aargau Wikipedia, revision of 2026-09-06

Machine-drafted from the cited Wikipedia passages and checked by a reviewing model, not by a human editor. Every passage cites the revision it was written from; dates and places follow those passages.