An Inquisition had existed in Aragón since 1232, when Pope [[Gregory IX]] had issued the [[Papal Bull]] ''[[Declinante]]'', although Castile had never had an Inquisition and Granada was an independent [[Islam]]ic stronghold. In 1474 Isabella succeeded to the throne of Castile and her husband Ferdinand to that of Aragón in 1479. They made a political decision to force religious conformity across all three regions, and the enforced conversion of the Jewish and Muslim population were crucial to their aim. | An Inquisition had existed in Aragón since 1232, when Pope [[Gregory IX]] had issued the [[Papal Bull]] ''[[Declinante]]'', although Castile had never had an Inquisition and Granada was an independent [[Islam]]ic stronghold. In 1474 Isabella succeeded to the throne of Castile and her husband Ferdinand to that of Aragón in 1479. They made a political decision to force religious conformity across all three regions, and the enforced conversion of the Jewish and Muslim population were crucial to their aim. |