Haguenau

Haguenau was an imperial city on the Moder in Lower Alsace, with an imperial palace built under Frederick Barbarossa. Under Rudolf I it became the seat of the imperial governor of Lower Alsace.

From 1354 Haguenau led the Decapole, a league of ten Alsatian imperial cities. The Peace of Westphalia transferred imperial rights over Alsace to France in 1648. Louis XIV ordered the fortifications and ruined palace razed in 1673; the Treaties of Nijmegen ended the city's imperial status and joined it to France in 1679.