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Abul-Hasan al-Hasan ibn Ali (also known as "Al-Hassan ibn Ziri"; 1109–1171) was the last ruler of the Zirid dynasty in Ifriqiya (1121–1152). He succeeded Ali ibn Yahya. Under his reign, piracy became an important source of income, although in turn this destabilised the relationships to the Christian maritime interests. In order to secure trade in the Mediterranean he was forced to accept dependence on the Norman-controlled Sicily. Between 1146 and 1148 the Zirid realm fell, and Abul-Hasan lost all regions except for Algiers, until it also fell but to the Almohad dynasty, or Moors. Abdul-Hasan lived in Marrakech until his death, securing some power of governance over al-Mahdiya. ==References== *Giosuè Musca, ''Il mezzogiorno normanno-svevo e le crociate'', Centro di studi normanno-svevi, Università di Bari (p. 106) 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Abul-Hasan al-Hasan ibn Ali」の詳細全文を読む スポンサード リンク
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