 Since the legitimacy granted by the church was necessary both, especially Isabella, to stay in power, the creation of the Spanish Inquisition may have been a way to apparently concede to the Pope's demands and criticism regarding Spain's mixed religious heritage, while at the same time ensuring that the Pope could hardly force the second inquisition of his own, and at the same time create a tool to control the power of the Roman Church in Spain.The Spanish Inquisition was unique at the time because it did not depend on the Pope in the slightest.Once the bull of creation was granted, the head of the Inquisition was the Monarch of Spain.