such a royal manor was known as a villa regia or curtis regia. They were located either near the bishop's residences, near important abbeys, near towns the king held or in the countryside in the middle of royal estates. Pfalzen were generally built at intervals of 30 kilometres, which represented a day's journey by horse at that time. At a minimum, a pfalz consisted of a palas with its Great Hall or Aula Regia, an imperial chapel (Pfalzkapelle) and an estate (Gutshof). It was here that kings and emperors carried out the business of state, held their imperial court sessions and celebrated important church festivals. Each was administered by a count palatine, who executed jurisdiction in the emperor's stead. One of the most important of them would eventually rise to the title of Prince-elector. The pfalzen that the rulers visited varied depending on their function. Especially important were those palaces in which the kings spent the winter (winter palaces or Winterpfalzen), and the festival palaces (Festtagspfalzen), Easter being the most important and celebrated at Easter palaces (Osterpfalzen). The larger palaces were often in towns that had special rights (e.g. imperial immediacy), but could also be bishop's seats or imperial abbeys. In the Hohenstaufen era of the Roman-German kingdom, important imperial princes began to demonstrate their claims to power by building their own pfalzen. Important examples of these include Henry the Lion's Dankwarderode Castle in Brunswick and the Wartburg above Eisenach in Thuringia. Both buildings followed the basic design of Hohenstaufen pfalzen and also had the same dimensions. List of Holy Roman Imperial palaces Examples of surviving imperial palaces may be found in the town of Goslar and at Düsseldorf-Kaiserswerth. Aachen Adelberg Aibling Albisheim Altenburg Altötting Alzey Amorbach Andernach Ansbach Arneburg Arnstadt Aufhausen Augsburg Baden-Baden Balgstädt Bamberg Bardowick Batzenhofen Belgern Beratzhausen Berstadt Biebrich Bierstadt Bingen am Rhein Böckelheim Bodfeld Bodman Bonn Boppard Boyneburg Brandenburg Braunschweig Breisach Breitenbach Breitingen Bremen Bruchsal Brüggen Bürgel Bürstadt Buxtehude Calbe Cham Cochem Corvey Dahlen Derenburg Diedenhofen Dollendorf Donaueschingen Donaustauf Donauwörth Dornburg Dortmund Duisburg Düren Durlach Ebersberg Ebrach Ebsdorf Eckartsberga Eger Eichstätt Eisenberg Eisfeld Eisleben Elten Eresburg Erfurt Ermschwerd Erwitte Eschwege Essen Esslingen am Neckar Ettenstatt Etterzhausen Eußerthal Flamersheim Forchheim Frankfurt am Main Freiburg im Breisgau Freising Fritzlar Frohse an der Elbe Fulda Fürth Gandersheim Gebesee Gehren Geldersheim Gelnhausen Germersheim Gernrode Gernsheim Gerstungen Giebichenstein Gieboldehausen Giengen Göppingen Goslar Gottern Grebenau Grone Großseelheim Günzburg Gustedt Hahnbach an der