Castile

kas-tel', a former kingdom in the central part of Spain. For a long time it was a frontier state,--a line of castles, as the name implies, against the Moors. By the marriage of its queen, Isabella, with Ferdinand, king of Aragon, in 1469, the crowns of Castile and Aragon were united. From this union sprang the modern kingdom of Spain. See Moors; Spain; Isabella; Aragon