One of the highlights of the upcoming Arts of the Islamic World auction in London is a magnificent 11th-century Umayyad brass astrolabe, signed by Muhammad ibn al-Saffar. Astrolabes are elaborate instruments designed to determine the solar or stellar hour at a specific location, allowing the user to make a number of astronomical or astrological observations. They were used by astronomers and navigators from classical antiquity to the Renaissance. Click ahead to♛ explore this fascinating object in more detail.
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26 April 2017 | London