While interpreting the tombstones and off-barrow (the term intro- duced by S. S. Sorokin) edifice of Euro-Asian nomads (deer-shaped stones, stelai, stone monuments, barrow entrances with “mustache”, etc.), investigators traditionally confine their study to describing the ritual actions performed during the burial procedure or while commemorating the deceased.Among off-barrow memorials, one can discern ridge barrows or barrows with “mustache”. These monuments, unique in their layout, can be encountered over a vast space, rang- ing from the west to east from the (...) Volga lowland to Altai and from the east to south, from the Urals to Tien-Shan; according to some estimates, their number exceeds 300. The unique appearance of these barrow complexes and the orientation of the ridges at the eastern part of horizon confirm the hypoth- esis of their astronomical orientation. To verify the validity of this hypothesis, the author of this study exam- ined 25 ridge-barrows using astronomical methods of analysis in 1989–1991 and 1997–1998. The results of the investigations, some of which have been published in scientific journals, indicated that al- most each one of them reveal the whole set of astronomically sig- nificant directions, which are linked with the extreme positions of the sun and the moon on the horizon and their meridian transit (culmination) (Bekbassar 1993, 1996, 1998). (shrink)