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Wernerseck Castle (German: Burg Wernerseck), also called the Kelterhausburg, is a late medieval hill castle in the municipality of Ochtendung in the county of Mayen-Koblenz in the German state of Rhineland-Palatinate. It owes its name to its founder and lord of the castle, the Archbishop of Trier, (1388–1418). "Wernerseck" means "Werner's corner".