Peace of Passau
In 1629, Emperor Ferdinand II issued the Edict of Restitution, by which church property that had been confiscated after 1552 under the Peace of Passau, was returned to its previous owner. Based on this Edict, the Prince Bishops of Mainz and Trier claimed substantial parts of the possessions of the Nassau. The Court of Appeal ruled in 1629 in a dispute between Lorraine and Nassau, that the city and county of Saarwerden and Bockenheim and Wieberstweiler were fiefs of Metz and should therefore be returned to Lorraine, and the Nassau family could keep the rest of their county.