El Mustansir was the son of El-Zaher ibn
El-Hakim
, he was about 7 years old when he ascended the throne and he was the Muslim ruler whose reign extended over the longest period .
He left the viziers to rule the country and to run its affairs . The most important vizier was El-Yazuri , who improved the conditions of the farmers , organized the process of selling and buying crops , put fixed and low prices for the crops and built large stores of corn at Fustat to reduce the effects of famine .
El-Zaher was interested in Art and Science . After his death , the country went from bad to worse . 40 ministers ruled the country in 9 years . Turkish and Sudanese soldiers fought against each other . The Nile flood was low for 7 years and a big famine happened and the people ate horses and donkeys . Finally , people began to eat each others and the dangerous diseases (especially plague) began to kill them all .
Turks took the palace from El-Mustansir and destroyed the Caliph's library , which contained more than 100 , 000 books .
At the end , the Caliph asked the help of the governor of Akka and appointed him vizier . The
Fatimid Dynasty
came to
its end .