 Ferdinand II of Aragon pressured Pope Sixtus IV to agree to an Inquisition controlled by the monarchy by threatening to withdraw military support at a time when the Turks were a threat to Rome.The pope issued a bull to stop the Inquisition but was pressured into withdrawing it.On 1 November 1478, Sixtus published the Papal bull, "Exigit Sinceras Devotionis Affectus", through which he gave the monarchs exclusive authority to name the inquisitors in their kingdoms.