Décapole
The Décapole (Dekapolis or German: Zehnstädtebund) was an alliance formed in 1354 by ten Imperial cities of the Holy Roman Empire in the Alsace region to maintain their rights. It was disbanded in 1679.
In 1354 Emperor Charles IV of Luxembourg ratified the treaty uniting the towns of Haguenau, Colmar, Wissembourg, Turckheim, Obernai, Kaysersberg, Rosheim, Munster, Sélestat and Mulhouse. Hagenau became its capital while the Imperial city of Strasbourg, though venue of the league's diets, remained outside the alliance. The town of Seltz joined the league when it received immediate status in 1357, but had to leave it after its mediatization to the Electorate of the Palatinate in 1414.
The affiliation at first discontinued after Charles' death in 1378, it was, however, re-established in the next year. The ten cities joined the Upper Rhenish Circle in 1500. In 1515, Mulhouse pulled out of the alliance in order to associate with the Old Swiss Confederacy. They were replaced by the Palatinate city of Landau in 1521.
