 The Benedictine abbey established at Alsatian Weissenburg (now Wissembourg) about 660 was eventually converted into a collegiate church (in 1524) then merged with the Bishopric of Speyer in 1546.The Speyer Prince-Bishops ruled as Provosts of Weissenburg in personal union, thereby holding two direct votes in the Imperial Diet.The 1648 Peace of Westphalia ceded Weissenburg to France, and the provostry was finally disestablished in the course of the French Revolution in 1789.