ARCHAEOLOGICAL EXPLORATIONS IN PLISKA (Rasho Rashev, Yanko Dimitrov – yanko_aim@mail.bg, Stanislav Ivanov) An area of 1100 sq. m was explored. The eastern sector is situated to the south of the pagan temple and close to the southern surrounding wall of bricks. Postholes, some of them with wedges of bricks, were documented. Three postholes under the pagan temple most probably were continuation of the row of postholes from the foundation of the circular timber building. Two parallel trenches from wooden fences with wedges of bricks were discovered. The exploration of the double postholes arranged in two parallel semicircular rows, some of them with wedges of bricks, continued. The western sector is situated to the east of the northern wing of the T-like building consisting of rooms arranged in a row. A section, 30 m long, of the wider secret underground passage was explored. The side timber supporting beams and the boards from the walls step on wedges of bricks. Pottery of the 8th – first half of the 9th centuries was found in the filling of the passage. The passage cut several trenches and the early water-conduit covered with bricks. A section, 15 m long, of the narrow secret underground passage was explored. The narrow passage is later than the wider one. Pottery of the 8th – first half of the 9th AD centuries was found in the filling of the passage. Two sections of the early water-conduit were explored. Pipes preserved in situ and mortar pad were discovered. Sections of three water-conduits, trenches from wooden walls and postholes of timber buildings were documented. One trench had a wedge of bricks and contained pottery of the 8th – 9th centuries AD. Postholes of a П-like timber building, 5.50 m by 3.50 m in size, were discovered. A pit, containing debris, animal bones, sherds, coins and lead seals of the first half of the 11th century, was explored.