Kaiserpfalz

The term Kaiserpfalz ("imperial palace") or Königspfalz ("royal palace") refers to a number of castles across the Holy Roman Empire that served as temporary, secondary seats of power for the Holy Roman Emperor in the Early and High Middle Ages. The term was also used more rarely for a bishop who, as a territorial lord (Landesherr), had to provide the king and his entourage with board and lodging, a duty referred to as Gastungspflicht.