Welcome to Encyclopædia Iranica Foundation
The Encyclopaedia Iranica Foundation was established in 1990 with the mission to guarantee the Encyclopædia Iranica's intellectual independence and ensure its ongoing publication both in digital and print versions. Learn More
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Cinema Iranica
Cinema Iranica provides historical articles on movies, genres, film movements, filmographies, directors, composers, stars, cinematographers ...
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Women Poets Iranica
Women Poets Iranica is an integrative encyclopedia of postclassical, modern, and contemporary women poets.
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Encyclopædia Iranica
The Encyclopædia Iranica is a comprehensive research tool dedicated to the study of Iranian civilization in the Middle East, the Caucasus, Central Asia, and the Indian subcontinent.
Featured Articles
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KHAYYAM, OMAR xv. As Mathematician
Three mathematical treatises of Omar Khayyam have come down to us: (1) a commentary on Euclid’s Elements; (2) an essay on the division of the quadrant of a circle; (3) a treatise on algebra; he also wrote (4) the treatise on the extraction of the nth root of the numbers, which is not extant.
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ḤABAQUQ, TOMB OF
This brick monument, the overall shape of which is comparable with the tomb of Amir Timur in Samarqand, consists essentially of an octagonal tower topped by a conical roof. Each of the eight sides of the roughly 7 meter high tower is embellished with the design of an inset arch.