Astrolabe of ‘Umar ibn Yusuf ibn 'Umar ibn 'Ali ibn Rasul al–Muzaffari. 13th century.Currently
Astrolabe of ‘Umar ibn Yusuf ibn 'Umar ibn 'Ali ibn Rasul al–Muzaffari. 13th century.Currently on display at the Metropolitan Museum of Art. -- source link
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