During the first peace of any substantial length (780–782), Charles began to appoint his sons to positions of authority. In 781, during a visit to Rome, he made his two youngest sons kings, crowned by the Pope. The elder of these two, Carloman, was made the king of Italy, taking the Iron Crown that his father had first worn in 774, and in the same ceremony was renamed "Pepin" (not to be confused with Charlemagne's eldest, possibly illegitimate son, Pepin the Hunchback). The younger of the two, Louis, became King of Aquitaine. Charlemagne ordered Pepin and Louis to be raised in the customs of their kingdoms, and he gave their regents some control of their subkingdoms, but kept the real power, though he intended his sons to inherit their realms. He did not tolerate insubordination in his sons: in 792, he banished Pepin the Hunchback to Prüm Abbey because the young man had joined a rebellion against him.