Round 6: Tossup 12

A book from this city describes a mechanical bull which moves back and forth to a trough to “drink,” as well as a lamp which refills itself as it burns oil. Two brothers known as the Banu Musa wrote the Book of Ingenious Devices in this city, (15[1])where translations (15[1]-5[1])of Greek texts were patronized by al-Mansur. (15[1])The field of (*) algebra (10[2])derives its (10[1])name from a scholar from this city, (10[1])al-Khwarizmi. (-5[1])A river apocryphally ran (10[1])black with ink from the books in libraries like those of the House of Wisdom after the Mongols (10[1])sacked (10[1])this city (10[1])in 1258. (10[2]-5[1])For 10 points, the Abbasid Caliphate ruled from what modern capital of Iraq? (10[1])■END■ (10[2])

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