The prior of Durham ranked first among the bishop's barons. He had his own court, and almost exclusive jurisdiction over his men. A UNESCO site describes the role of the Prince-Bishops in Durham, the "buffer state between England and Scotland":From 1075, the Bishop of Durham became a Prince-Bishop, with the right to raise an army, mint his own coins, and levy taxes. As long as he remained loyal to the king of England, he could govern as a virtually autonomous ruler, reaping the revenue from his territory, but also remaining mindful of his role of protecting England’s northern frontier.