赫爾維蒂共和國
The Fricktal, ceded in 1802 by Austria via Napoleonic France to the Helvetic Republic, was briefly a separate canton of the Helvetic Republic (the canton of Fricktal) under a "Statthalter" ('Lieutenant'), but on 19 March 1803 (following the Act of Mediation) was incorporated into the canton of Aargau.