sentences:  Under his reign, piracy became an important source of income, although this destabilised relationships with 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 collapsed, and Abul-Hasan lost all of his realm except for Algiers, until it in turn fell to the Almohad dynasty
  
  Abdul-Hasan lived in Marrakech until his death, securing some power of governance over al-Mahdiya.