The Spanish town of Arjona declares independence and names its native Muhammad ibn Yusuf as ruler. This marks the Muhammad's first rise to prominence; he later established the Nasrid Emirate of Granada, the last independent Muslim state in Spain.

Arjona is a municipality in the province of Jaén, Andalusia, Spain. It is located 44 kilometres (27 mi) from the provincial capital, Jaén, and 77 kilometres (48 mi) from the city of Córdoba. It has an area of 158.45 square kilometres (61.18 sq mi), and as of 2017 it had a population of 5,662. It belongs to the comarca of Campiña. Its land area is primarily agricultural, with an emphasis on olive trees. Its economy relies primarily on agriculture and olive oil production, but it is also known for its furniture and baking industries. Arjona is known as the birthplace in 1194 of Muhammad I, founder of the Emirate of Granada.

Abu Abdullah Muhammad ibn Yusuf ibn Nasr, also known as Ibn al-Ahmar and by his honorific al-Ghalib billah, was the first ruler of the Emirate of Granada, the last independent Muslim state on the Iberian Peninsula, and the founder of its ruling Nasrid dynasty. He lived during a time when Iberia's Christian kingdoms—especially Portugal, Castile and Aragon—were expanding at the expense of the Islamic territory in Iberia, called Al-Andalus. Muhammad ibn Yusuf took power in his native Arjona in 1232 when he rebelled against the de facto leader of Al-Andalus, Ibn Hud. During this rebellion, he was able to take control of Córdoba and Seville briefly, before he lost both cities to Ibn Hud. Forced to acknowledge Ibn Hud's suzerainty, Muhammad was able to retain Arjona and Jaén. In 1236, he betrayed Ibn Hud by helping Ferdinand III of Castile take Córdoba. In the years that followed, Muhammad was able to gain control over southern cities, including Granada (1237), Almería (1238), and Málaga (1239). In 1244, he lost Arjona to Castile. Two years later, in 1246, he agreed to surrender Jaén and accept Ferdinand's overlordship in exchange for a 20-year truce.

The Nasrid dynasty was an Arab dynasty that ruled the Emirate of Granada from 1232 to 1492. It was the last Muslim dynasty in the Iberian Peninsula. Twenty-three sultans ruled Granada from the founding of the dynasty in 1232 by Muhammad I until 1492, when Muhammad XII surrendered all lands to Isabella I of Castile. Today, the most visible evidence of the Nasrid dynasty is the Alhambra palace complex built under their reign.