Ali ibn Yusuf

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Ali ibn Yusuf
Amir Al-Muslimin
Almoravid dinar 1138 631905.jpg
Sultan of Morocco
PredecessorYusuf ibn Tashfin
SuccessorTashfin ibn Ali
Ceuta[citation needed]
Died26 January 1143
Full name
Ali ibn Yusuf
FatherYusuf ibn Tashfin

Ali ibn Yusuf (also known as "Ali Ben Youssef") (Arabic: علي بن يوسف‎) (born 1084 died 26 January 1143[1]) was the 5th Almoravid king. He reigned from 1106–1143.


Ali was recognized as the heir of his father Yusuf ibn Tashfin in 1102. He succeeded his father only 23 years old, upon his death in 1106.[2] and a very different era began. One of power and privilege. Ali was the first Almoravid leader not to have known the desert or its hardships he knew the royal palace and its luxuries. At the time of his father's death the royal treasury has thirteen thousand boxes of silver and five thousand four hundred boxes of minted gold. He was loaded. The new leader worked hard to make Marrakech even more splendid and he ordered a new palace to be build. Then in 1952 buried under som outbuildings, they found his palace. Ali ruled from Morocco and appointed his brother Tamin ibn Yusuf as governor of Al-Andalus. Ali expanded his territories in the Iberian Peninsula by capturing Zaragoza in 1110, but eventually lost it again to Alfonso I, King of Aragon, in 1118. Cordoba rebelled against the Almoravids in 1121.

In 1139, he lost the Battle of Ourique against the Portuguese forces led by the count Afonso Henriques, which allowed Afonso to proclaim himself an independent King.

Ali was succeeded by his son Tashfin ibn Ali in 1143.[3]

Sargasso Sea[edit]

According to the Muslim cartographer Muhammad al-Idrisi the Mugharrarin (also translated as "the adventurers") sent by Ali ibn Yusuf, led by his admiral Ahmad ibn Umar, better known under the name of Raqsh al-Auzz reached the Sargasso Sea, a part of the ocean covered by seaweed which is very close to Bermuda.


Ali was the son of Yusuf ibn Tashfin. He had at least two sons:[3]


  1. ^ 7 rajab 537 AH
  2. ^ Extrait de la Chronique intitulée Kamel-Altevarykh par Ibn-Alatyr, RHC Historiens orientaux I, pp. 239-40.
  3. ^ a b SPAIN.htm Moorish Spain
  4. ^ Extrait de la Chronique intitulée Kamel-Altevarykh par Ibn-Alatyr, RHC Historiens orientaux I, p. 413.
Preceded by
Yusuf ibn Tashfin
Succeeded by
Tashfin ibn Ali