Abu Yaqub Yusuf
Abu Yaqub Yusuf I (Abū Yaʿqūb Yūsuf ibn Abd al-Mu'min)
5 min read
The second Almohad caliph (not Almoravid), he reigned from 1163 to 1184 over the Maghreb and al-Andalus. A man of letters and a patron of scholars, he brought the philosophers Ibn Tufayl and Averroes (Ibn Rushd) to his court. He died during the siege of Santarém in Portugal.
Frequently asked questions
Key Facts
- Becomes Almohad caliph in 1163 upon the death of his father Abd al-Mu'min
- Brings the philosopher Ibn Tufayl, and later Averroes (Ibn Rushd), to his court around 1169
- Encourages Averroes to write his commentaries on Aristotle
- Establishes Seville as a major center of Almohad power in al-Andalus
- Dies in 1184 from wounds suffered at the siege of Santarém (Portugal)
Works & Achievements
By inviting these thinkers to his court, the caliph enabled the writing of the great commentaries on Aristotle, which would have a lasting influence on medieval Europe.
A vast architectural program; the Almohad minaret served as the base for the famous bell tower that now stands at Seville Cathedral.
A gathering of scientific and philosophical works that made his court a major center of learning in the western Mediterranean.
The construction of canals and aqueducts to supply the city with water, a sign of a policy of urban beautification.
Maintaining the unity of the vast empire spanning the Maghreb and al-Andalus through military campaigns and a centralized administration.
Anecdotes
Abu Yaqub Yusuf was a passionate scholar: it is said that he knew many poems by heart and discussed philosophy with his learned men. It was he who asked Ibn Tufayl to find him someone to comment on the difficult works of Aristotle — and Ibn Tufayl introduced him to the young Averroes.
During their first meeting, Averroes was terrified when the caliph questioned him about the eternity of the world, a dangerous topic that could be seen as heresy. But seeing the immense learning of the ruler, the philosopher relaxed and was able to speak freely: this was how the great series of commentaries on Aristotle began.
The caliph launched the construction of the great mosque of Seville, whose minaret served as the base for the famous Giralda, still standing today. He also brought in engineers to improve the city's water supply.
He died in 1184 from wounds received during the siege of Santarém, in Portugal, a military campaign that went badly wrong. His body was brought back to Tinmel, in the High Atlas, near the tomb of the founder of the Almohad movement, Ibn Tumart.
Although he protected philosophers, Abu Yaqub Yusuf had to accommodate the rigorist religious jurists of his empire. Philosophy was therefore often practiced in private, at court, away from the eyes of the strictest theologians.
Primary Sources
The Commander of the Faithful asked me: “What is their opinion (that of the philosophers) about the heavens? Are they eternal or created?” Fear gripped me, but seeing his learning, I began to speak.
Abu Yaqub Yusuf loved the sciences and gathered a considerable library; he drew to himself scholars from every discipline.
The caliph ordered the building of the great mosque of Seville and had canals dug to bring water to the city.
Key Places
Capital of al-Andalus under Abu Yaqub Yusuf, where he established his court and had the great mosque built along with its minaret, the future Giralda.
Capital of the Almohad empire in the Maghreb, center of caliphal power and a hub of activity for scholars such as Averroes.
Fortified town in Portugal that the caliph besieged in 1184; he was mortally wounded there.
Almohad sanctuary in the High Atlas mountains, housing the tomb of Ibn Tumart and the burial place of the Almohad caliphs.
A great intellectual center of al-Andalus, the birthplace of Averroes, who was protected by the caliph.
