ARCHAEOLOGICAL EXPLORATIONS NEAR THE VILLAGE OF KOLAROVO (Georgi Mitrev – gmmitrev@yahoo.com, Sotir Ivanov) A defensive wall (Dema wall) with a ditch to the east was registered. The Dema wall is double with an empty space (corridor) between both walls. The construction is up to 3.60 m in width: the wall from the east is 1.40 m in width, the corridor between both walls is c. 1.20 m in width and the wall from the west is 1 m in width. The Dema wall was constructed of dry-stones without bonding medium. Uneven stones and boulders were used. The preserved height of the Dema wall is 1.70 m. The defensive wall was traced at c. 300 m to the north. The newly registered Dema wall barred the area between the Debralsko Dere and Ludo Dere localities. In addition to the main double defensive wall, other walls and piles of stones, part of them probably secondary, were registered in some sectors of the Dema wall. Identical defensive walls are situated at 10 km to the west near the village of Klyuch. They belong to the Dema wall that was built by the Bulgarian King Samuel (997 – 1014) in the early 11th century. The Dema wall near the village of Kolarovo probably dates to the same period. It is possible to assume that the Dema walls played the role of first defensive barrier in the fortification constructions, which were built by King Samuel before the battle in 1014, in order to stop the invading army of the Byzantine Emperor Basil II.