Most likely, the erecting of the barrows appears in the North-Western Black Sea region no later than the second quarter of the 4th millennium BC and continues until modern times, while the Nogais population is still preserved in the Budzhak steppe. Analyzing even incomplete data, for example, published materials from the territory of the Republic of Moldova, it is easy to see that the barrow erecting covers two main chronological sequences. Most of the mounds were erected in the late Eneolithic – early Bronze Age and early Iron Age – Roman period. Between the end of the Early Bronze Age and the beginning of the Early Iron Age, the bearers of the burial cultures either used the already existing barrows or formed flat cemeteries. 134 burial mounds (or 10%) belong to the late Eneolithic and the Early Bronze Age before the penetration of Yamnaya tribes and 460 (or 35%) to the Yamnaya culture. The beginning of the Kurgan Era is characterized by one important feature that distinguishes it from the Kurgan Renaissance in the Scythian and Sarmatian times, which include 248 (19%) and 176 (13%) mounds, respectively. In addition to the erection of burial mounds, the Yamnaya and Pre-Yamnaya population rearranged both “their own” and previous mounds (that increase the diameter and height of the barrow). E.g. for the Eneolithic and Early Bronze Age cultures, preceding the Yamnaya one, in addition to 134 burials, 31 cases of barrow rearrangement are known. Already in the Yamnaya time, in addition to 460 burial mounds erected by the Yamnaya tribes, 321 cases of rearrangement were recorded. During the Scythian and Sarmatian periods, the barrows were almost not rearranged, and the size of the erected mounds was significantly reduced: for the Pre-Yamnaya period the diameter of the barrow varied within 20-35 m, in the Yamnaya time it was up to 25-40 m, then in the Scythian period, the diameter of most of the mounds was 10-20 m, in the Sarmatian one – 15-30 m. Fig. 1. Chronological and spatial dynamics of the barrow erecting (A) and rearrangement (B) in the Dniester-Prut-Danube-interfluve. I – Pre-Yamnaya cultures; II – Yamnaya culture; III – Catacomb, Multi-cordoned ware culture, Sabatinovka and Belozerka culture; III – Scythians, Sarmatians and Medieval nomads