Astrolabe of cUmar ibn Yusuf al-Muzaffari, Rasulid period dated A. Invented in ancient Greece, the astrolabe is a sophisticated tool for observing the position of the stars.
Astrolabe of 'Umar ibn Yusuf ibn 'Umar ibn 'Ali ibn Rasul al–Muzaffari, Rasulid period dated A. cast and hammered, pierced, chased, inlaid with silver; The Metropolitan Museum.
El Palacio de la Aljafería - Zaragoza, España - The Aljafería Palace is a fortified medieval Islamic palace built during the second half of the century in the Moorish taifa of Zaragoza of Al-Andalus, which is now present day Zaragoza, Spain.
The Earliest Surviving Dated Astrolabe – An astronomical instrument used for observing planetary movements, was indispensable for navigation. A type of analog calculator, brass astrolabes were developed by mathematicians in the medieval Islamic world.
Zainab's Lounge - upfront blogging: Muslim scientists, doctors, academics of medieval Islamic world
Medicine in the medieval Islamic world - Wikipedia, the free encyclopedia