In 933, Hugh of Arles ("Hugues de Provence") gave his kingdom up to Rudolph II, who merged the two kingdoms into a new Kingdom of Arles. In 1032, King Rudolph III died, and the kingdom was inherited by Emperor Conrad II the Salic. Though his successors counted themselves kings of Arles, few went to be crowned in the cathedral. Most of the kingdom's territory was progressively incorporated into France. During these troubled times, the amphitheatre was converted into a fortress, with watchtowers built at each of the four quadrants and a minuscule walled town being constructed within. The population was by now only a fraction of what it had been in Roman times, with much of old Arles lying in ruins.