Ideas for universal astrolabes - II
A rare form of universal astrolabe, known as the 'Universal Lamina', probably invented at Toledo in the 11th century. In this example an unusual rete rotates above a horizontal projection of the celestial sphere.
Astrolabe with Universal Lamina, by 'Ali ibn Ibrahim al-Harrar, Taza, Morocco, 1327/8 (
Inv. 50853)