Example image of eyePlorer eyePlorer map for 'County of Holland': County Holy Roman Empire Netherlands North Holland Schokland South Holland Terschelling Urk Vlieland Charlemagne Francia Gau (country subdivision) Pagus Count Barter Usufruct Vassal Feudalism Capitulary of Quierzy Carolingian Empire Roman Empire Partible inheritance Viking Treaty of Ribemont East Francia Lotharingia Low Countries Duchy of Saxony Duke of Swabia Franconia List of rulers of Bavaria Stem duchy Louis the Child Charles the Simple Conrad I of Germany West Francia Henry the Fowler Gilbert, Duke of Lorraine Floods in the Netherlands Louis the Pious Friesland Frisia Holland Lothair I Rorik of Dorestad Godfrid, Duke of Frisia Gerolf of Holland Allodial title Arnulf of Carinthia Aalburg