The article presents new materials on the cartography of the ancient defensive valla of Southern Bessarabia, or Budzhak. In the scientific use there is introduced the previously unknown topographical map of 1864, which marked the coastal part of the Lower Dniester (Serpent's) Wall, as well as other data that clarify the topography of these sites.

List of illustrations:

Fig. 1. Land plots of the Şaba and Şabalat villages on the map of Bessarabia of 1828.

Fig. 2. Fragment of A.P. Chirkov's „Special Map", 1864.

Fig. 3. Part of the Lower Dniester (Serpent's) Wall on A.P. Chirkov's „Special Map", 1864.

Fig. 4. Land plots of the Talmaza and Cioburciu villages on the map of Bessarabia of 1828.

Fig. 5. Land plot of Akkerman on the map of Bessarabia of 1828.

Fig. 6. Land plot of the Nekrasovka vilage on the map of Bessarabia of 1828.

Fig. 7. Area of the Monastyrsky Cape on the map of the Danube Delta of the European Danube Commission, 1887.

Fig. 8. Area of the Monastyrsky Cape on the German map of 1941.

Fig 9. Tashbunar village and a part of the Lower Trajan's Wall on the German map of 1941.

Fig. 10. Fortification near the Novosel'skoye village on the map of the Danube Delta, 1860s.

Fig. 11. Fortification near the Novosel'skoye village on "The map of the Balkan Peninsula covering the entire theatre of war of 1877-1878".