14th century, Einbeck A planispheric astrolabe consisting of a mater, rete, ruler, alidade as well as a pin and wedge (horse) holding all the elements together. The design of the rete is based on the four-leaf clover symbol - the four halves supporting the equator and the ecliptic are spaced along the astrolabe's major axes, one full clover is inside the circle of the ecliptic, and two quarters of the clover provide support for the arc below the ecliptic. **For more images and further information, visit:** https://muzea.malopolska.pl/en/objects-list/2783 Inventory number: 4043; 41/V Localisation of the physical object: Jagiellonian University Museum, Collegium Maius, Kraków, Poland **Digitalisation: Regional Digitalisation Lab, Małopolska Institute of Culture in Kraków, Poland; “Virtual Museums of Małopolska” Project** **3D model by Stanisław Ogarek**