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Yaqub ibn Yusuf ibn Killis ((アラビア語:يعقوب ابن كليس)), (930 in Baghdad – 991) was a high-ranking official of the Ikhshidids who went on to serve as vizier under the Fatimids from 979 until his death in 991). Yaqub ibn Yusuf ibn Killis was born in Baghdad in 930 in a Jewish family. After his family moved to Syria he came to Egypt in 943 and entered the service of the Regent Kafur. Soon he controlled the Egyptian state finances in his capacity as household and property administrator. Although he converted to Islam in 967, he fell out of favour with the successors of Kafur and was imprisoned. He was able however to purchase his freedom and went to Ifriqiya, where he put himself at the service of the Fatimid Caliph al-Mu'izz. After the Fatimid conquest of 969, Ibn Killis returned to Egypt and was put in charge of the economy, where he was able to regularise the state finances. After the dismissal of Jawhar as-Siqilli in 979 Yaqub ibn Killis was appointed vizier by al-Aziz, a position he held until his death in 991. He was a patron of culture and science. ==Early life== Abu al-Farj Yaqub ibn Yusuf, known as Ibn Killis, was born of an honorable family of Baghdad. By birth he was a Jew, born in 930. At a young age he came with his father to Egypt, where he started his political life at the court of Kafur, the power behind the throne of the Ikhshidid regime. He was very intelligent, hard working and honest. Very soon he secured an important position in the court of Kafur as an expert in economics. In 967, he embraced Islam, by which Kafur was highly pleased and appointed him as his courtier. This aroused the jealousy of his rival, the vizier Ibn al-Furat, who began to seek a way to eliminate him. In 968 Kafur died and Ibn al-Furat arrested all his companions including Yaqub ibn Killis. It is said that Yaqub bribed the jailor and absconded to the Ifriqiya, where the Fatimid Caliph al-Mu'izz ruled. Al-Mu'izz,assigned Yaqub the responsibility of the country's economy. Through his past experiences he carried out his work with great efficiency. Thereafter at the time of conquest of Egypt, al-Mu'izz, deputed him with Jawhar as-Siqilli for the management there. According to another version, Yaqub accompanied the al-Mu'izz when he went to Egypt in 972. After the Fatimid takeover of Egypt, Ibn al-Furat continued in office as vizier, but in 974 he resigned and al-Mu'izz handed over the administration to Ibn Killis. During the last years of the reign of al-Mu'izz, and the first two years of the period of his successor al-Aziz, (975-996), due to toil, honesty and intelligence of Yaqub ibn Killis, this position became firm and stable, so much so that in 977-78 al-Aziz appointed him as ''Wazir al-Adjall'' (Chief Minister). Prior to this, the first four Fatimid caliphs had an assistant called ''wasta''. During his tenure as vizier, Yaqub ibn Killis established various departments anew for the administration of the state, promoted agriculture, reformed trade and stabilised the currency, by which the country began to flourish and revenue of provinces increased. In this very period the treasury was so full as never before. In 983/4 he fell from favour, and al-Aziz fined him 20,000 gold dinars, but the cause is unknown. Nevertheless, within a few months he was reinstated to his post. 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「Yaqub ibn Killis」の詳細全文を読む スポンサード リンク
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