Little is known about the life of Ghija ud-din Abu'l Fath Umar Ibn Ibrahim Ul-Khayyami (1048-1131), as he is called in the oldest Arabic sources. He was regarded as a great mathematician and astronomer who became famous for his scientific treatises in Arabic, but above all for creating a calendar that in some respects was even superior to the Gregorian calendar. This was officially introduced in 1079, replacing the Arabic-Islamic lunar year with the Persian solar year. In Europe, he became known as Omar Khayyam due to his 750 quatrains (Rubaiyat). He was born in Nishâpur, the largest city in ancient Persia (Iran) at the time. He spent most of his life here and also died and was buried there.
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Dr. Christa Hanten
Fachjournalistin, Lektorin und Verkosterin, Wien