In the Holy Roman Empire, and to a degree in its successor states the German Confederation and the German Empire, so-called "free imperial cities" (nominative singular freie Reichsstadt, nominative plural freie Reichsstädte) held the legal status of imperial immediacy, according to which they were not subinfeudated to any vassal ruler and were instead subject to the authority of the Emperor alone. Examples included Hamburg, Bremen, and Lübeck, along with others that gained and/or lost the privileges of immediacy over the course of the Empire's history.