A dying tradition
By the late seventeenth century astrolabes were no longer in demand in Europe and examples are rare. This French instrument takes an unusual form, having no loose plates, but a projection for Paris on one side and a universal Rojas projection on the other. The rete has only five stars, all within the ecliptic.
Astrolabe, by Pierre Sevin, Paris, c.1670 (Inv. 42680)