Monument Of Muhammad Ibn Musa Al-Khwarizmi At The Itchan Kala, Khiva, Uzbekistan. Al-Khwarizmi Was A Persian Mathematician, Astronomer And Geographer Born In 780 An Died In 850. In The 12Th Century Latin Traslation Of His Work On The Indian Numerals Introduced The Decimal Position Number System In The Western World. Itchan Kala Is The Walled Inner Town Of The City Of Khiva. Since 1990 It Has Been

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ancient asia asian astronomer city culture destination geographer heritage historic history itchan kala khiva landmark mathematician mathematics monument old outdoor place site town tradition traditional travel unesco urban uzbek uzbekistan walled world