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Related to Old Castile: New Castile
A historical region of north-central Spain that combined with New Castile to the south to form the kingdom of Castile. It was united with Aragon after the marriage of Ferdinand and Isabella (1469).
(Placename) a region of N Spain, on the Bay of Biscay: formerly a province. Spanish name: Castilla la Vieja
a region in N Spain: formerly a province. Spanish, Castilla la Vieja.