Round 6: Tossup 1

Dimitri Gutas argued that this place didn’t exist because the author of the Book of the Ten Treatises of the Eye never wrote about it. The Maragheh observatory was built by a person who worked in this place, which was legendarily constructed at the center of a “Round City.” (-5[1])In this place, (-5[1])the “Sons of Moses” wrote the Book of Ingenious Devices. Under (*) al-Maʿmun, this institution led the Translation Movement. Al-Khwarizmi developed Algebra while at this (10[1])institution. The Tigris legendarily (10[1])turned black from ink after Hulagu Khan's (10[1])forces threw books from this place into it. For 10 points, name this Islamic learning institution in Baghdad. ■END■ (10[1])

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