Where is the oldest known star map from antiquity preserved?

Ancient star charts and manuscripts associated with the Dunhuang discoveries are preserved in collections in China and abroad, including important holdings in the British Library. These documents date mainly to the Tang dynasty, around the 7th to 10th centuries CE. They are among the earliest surviving detailed records of the night sky and show sophisticated astronomical knowledge. Xi’an is strongly associated with Chinese astronomy because it was an imperial capital and a center of scholarship, though the famous Dunhuang materials were discovered in a cave library in Gansu.