Hebrew Astrolabe Astrolabe, c. 1345-55, Brass (?), 4 1/3 x 3 5/8 x 7/8 in. (11 x 9.2 x 2.18 cm), (British Museum, London) Speakers: Pippa Couch, Rachel Ropeik http://smarthistory.org/hebrew-astrolabe.html
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