Planispheric Astrolabe, from the Iberian peninsula, 14th c., bronze inlaid with silver, 5 1/3 inches diameter; courtesy of Aga Khan Museum, Toronto.
Planispheric Astrolabe, from the Iberian peninsula, 14th c., bronze inlaid with silver, 5 1/3 inches diameter; courtesy of Aga Khan Museum, Toronto.