The Prince-Bishopric of Liège or Principality of Liège was a Roman Catholic ecclesiastical principality of the Holy Roman Empire that was situated for the most part in present-day Belgium. It was an Imperial Estate, so the bishop of Liège, as its prince, had a seat and a vote in the Imperial Diet. The Prince-Bishopric of Liège should not be confused with the Diocese of Liège, which was larger and over which the prince-bishop exercised only the usual responsibilities of a bishop.
The bishops of Liège acquired their status as prince-bishops between 980 and 985 when Bishop Notker of Liège, who had been the bishop since 972, received secular control of the County of Huy from Emperor Otto II.
