Zayn al-Din Gorgani dating history

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Zayn al-Din Sayyed Isma‘il ibn Husayn Gorgani (1040–1136), also spelled al-Jurjani, was a Persian 12th century royal Islamic physician from Urganj, Uzbekistan. In addition to medical and pharmaceutical sciences, he was also an adept in theological, philosophic and ethical sciences. He was a Persian physician and learned the rudiments of medicine in Kunya-Urgench, Old Urgench or Urganj of Uzbekistan. Jurjani was a pupil of Ibn Abi Sadiq and Ahmad ibn Farrokh. He arrived at the court in the Persian province of Khwarazm in the year 1110 when he was already a septuagenarian. There he became a court physician to the governor of the province, Khwarazm-Shah Qutb al-Din Muhammad I, who ruled from 1097 to 1127. It was to him that he dedicated his most comprehensive and influential work, the Persian-language compendium Zakhirah-i Khvarazm'Shahi.