Luis de Santángel (died 1498) was a baptized Jew and finance minister of Ferdinand II. He introduced Christoffa Corombo and his voyage plans to Isabella I, and financed most of Christoffa's voyage.
Luis joined the Assassin Order some time prior to 1488. He and fellow Assassin Raphael Sanchez became close to Queen Isabella and King Ferdinand to prevent the Templars from getting complete control over the monarchy.
Journey to Italy
Eventually, he met with Christoffa Corombo, who had plans to sail west. The [[Assassins[[ and Templars both knew of another continent, America, and informed Christoffa of this. Rodrigo Borgia, leader of the Italian Templars, found out about Christoffa's planned journey and arranged a meeting with him, claiming he wanted to finance the journey.
Luis knew that the meeting was a trap and contacted the leader of Venice's thieves, Antonio, to help him protect Christoffa. Antonio then called Ezio Auditore da Firenze for the job, who accepted after he heard that Borgia involved. Ezio successfully rescued Christoffa.
Taking down the Spanish Inquisition
Luis returned to Spain along with Christoffa and met with Ezio again some time later. He revealed himself to be an Assassin like Ezio himself. He guided Ezio in eliminating the Templars' plans and later introduced him to Queen Isabella I. A while afterwards, Ezio set out to take the live of the Inquisitor General Tomás de Torquemada. However, Ezio found out that Tomás wasn't a Templar himself and was just fooled into taking down the Assassins by Rodrigo Borgia. Thus, he spared his life and returned to Italy.
The Templars' influence over the Spanish royal house grew too strong and the Assassins concluded that they had to poison Queen Isabella. Luis was assigned with doing so, but he died before he could finish his work, in 1498.
With his death, there was no one to inform the other Assassins of the Templars' activities in the royal house. Therefore, Ezio Auditore sent his apprentices to Spain to recover Santángel's journal in 1503.