Ambrosiana
READING ROOM CLOSURE FROM SEPTEMBER 24 TO 29
Reading room closed from September 24 to 29 included
24/09/2025-29/09/2025
An astrolabe is an ancient instrument used to locate the position of celestial bodies (sun, moon and stars): it represents the celestial vault projected on a plane. Astrolabes were used until the 17th century, when more precise astronomical instruments were introduced. However, they were included in scientific collections as a sign of cultural refinement. This astrolabe, dating from 1500, could determine the position of thirty eight stars.