A bailiff (French: bailli, French pronunciation: [baji]) was the king’s administrative representative during the ancien régime in northern France, where the bailiff was responsible for the application of justice and control of the administration and local finances in his bailiwick (baillage).
In the late 12th and early 13th century, King Philip II, an able and ingenious administrator who founded the central institutions on which the French monarchy's system of power would be based, prepared the expansion of the royal demesne through his appointment of bailiffs in the king's northern lands (the domaine royal), based on medieval fiscal and tax divisions (the "baillie") which had been used by earlier sovereign princes such as the Duke of Normandy. In Flanders, the count appointed similar bailiffs (Dutch: baljuw). The equivalent agent in the king's southern lands acquired after the inheritance of the County of Toulouse was the seneschal.
Unlike the local administration of Norman England through sheriffs drawn from the great local families, the bailiff was a paid official sent out by the government, who had no power network in the area to which he had been assigned, and, in the way of a true bureaucrat, owed his income and social status wholly to the central administration that he represented. "He was therefore fanatically loyal to the king," Norman Cantor observes, "and was concerned only with the full exercise of royal power." The cathedral schools and the University of Paris provided the clerks and lawyers who served as the king's bailiff.