.jpg)
Yusuf I (29 June 1318 – 19 October 1354) was the seventh Nasrid ruler of the Emirate of Granada on the Iberian Peninsula, from 1333 until his death. He allied with the North African Marinids against Alfonso XI of Castile. After a naval victory in April 1340, the Marinid–Granadan alliance was decisively defeated in the Battle of Río Salado (depicted). In 1342–1344, Alfonso besieged and captured the port of Algeciras. A ten-year peace treaty followed, but Alfonso broke it and besieged Gibraltar in 1349. The siege ended when Alfonso died of the Black Death in March 1350. Yusuf signed a treaty with Alfonso's son and successor Peter I. Yusuf was assassinated by a madman while praying in the Great Mosque of Granada. During his reign, the emirate flourished in the fields of literature, medicine, and law. Yusuf was responsible for many new buildings, and major cultural figures served in his court. Modern historians consider his reign and that of his son Muhammad V as the golden era of the Emirate. (Full article...)