DescriptionKingdomofJórvik.svg English: Map of the KingdomofJórvik. Nederlands: Kaart van het koninkrijk Jórvik. Date 2 August 2017 Source File:Kingdomof Jorvik
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this is because Yorkshire was originally a succesor to the Viking KingdomofJorvik which covered a wide area. Date 1086 (survery taken) 2009 (image created)