The Nasrid dynasty ( banū Naṣr) was the last Muslim dynasty in Spain, ruling the Emirate of Granada from 1238 until 1492. The Nasrid dynasty rose to power after the defeat of the Almohad Caliphate in 1212 at the Battle of Las Navas de Tolosa. Twenty-three emirs ruled Granada from the founding of the dynasty in 1232 by Mohammed I ibn Nasr until January 2, 1492, when Muhammad XII surrendered to the Christian Spanish kingdoms of Aragon and Castile. Today, the most visible evidence of the Nasrids is the Alhambra palace complex built under their rule.