Rudolf I of Germany
The envoys of Charles' father with the representatives of Rudolf I of Germany and the Holy See started negotiations about the restoration of the Kingdom of Arles in 1278. They reached a compromise, that Pope Martin IV included in a papal bull on 24 May 1281. The bull prescribed that the kingdom, which should include the Dauphiné, Savoy and the nearby territories, was to be given to Charles' son, Charles Martel, on the day of his marriage with Rudolf's daughter, Clemence. Charles was appointed regent for his minor son.