Abstract. Questions related to the level of astronomical knowledge in Volga Bulgaria and the Golden Horde in the 10th-16th centuries are presented. Fragments of astronomical instruments found during excavations at the Tsarevo site are analyzed. These are the remains of the mount of the celestial globe and the tympan – a detail of the astrolabe. A reconstruction of the original appearance of the instruments was carried out, and their purpose was described briefly. Using the lines on the surface of the tympan, an attempt was made to restore the latitude of the place for which tympanum was intended.
Keywords: astrolabe, tympan, celestial globe, Golden Horde, Volga Bulgaria, Tsarevo site, Akikula (Afkula), Hermitage, Kunstkamera