Proposed work prof. K.V. Kudryashova concerns the historical geography of the Black Sea steppes. Detailed information about the Polovtsian land is reported here. At the end of the XI and in the XII century. Polovtsy occupied the space between the Danube and Yaik (Ural), as well as the steppes of the Ciscaucasia. Borders are established between Russian and Polovtsian possessions in the XII century.