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The Caliph, Abbasid, builds a new centre in Baghdad.

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Mathematician and scientist, Al-Khwarizmi is born and is the "Father of Algebra".

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Al-Azhar University in Cairo, Egypt is founded.

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Ibn Sina completes his encyclopedia of medicine called The Canon of Medicine. It will become the standard medical textbook throughout Europe and the Middle East for hundreds of years.

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Famous poet and scientist Omar Khayyam is born.

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Christian armies recapture Jerusalem during the First Crusade.

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Saladin retakes the city of Jerusalem.

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The Mongol army sacks the city of Baghdad destroying much of the city and killing the Caliph