Westerburg is a small town of roughly 6,000 inhabitants in the Westerwaldkreis in Rhineland-Palatinate, Germany. The town is named after the castle built on a hill above the medieval town centre

The House of Leiningen is the name of an old German noble family whose lands lay principally in Alsace, Lorraine, Saarland, Rhineland, and the Palatinate. Various branches of this family developed over the centuries and ruled counties with Imperial immediacy.