On January 1, Castilian troops take control of the Alhambra palace under agreed-upon terms of surrender. The next day, Boabdil gives the keys to the city to the Catholic monarchs in a ceremony attended by Christopher Columbus. Within a few weeks, the Catholic monarchs issue a decree expelling all Jews from their domains, at the urging of Tomás de Torquemada, Chief Inquisitor. Many Muslims depart for North Africa. Those remaining become Mudejars.