Original: It was called County of Castile and was held in vassalage from the Kingdom of LeÃ n. Its name comes from the host of castles constructed in the region . It was one of the kingdoms that founded the Crown of Castile , and the Kingdom of Spain .
Simplified: It began in the 9th century : it was called County of Castile and was a vassalage depending from the Kingdom of LeÃ n/O. It was one of the kingdoms that existed before the Kingdom of Spain .