TUIDA (Boris Borisov – bdborisov@abv.bg, Julieta Giuleva) The explorations of the Early Byzantine and Mediaeval fortress Tuida (Tsoida) were resumed. A sector of the southern fortification wall, 27 m long and located close to the southwestern corner tower, was explored. The fortification wall was 1.20 m wide, built of mortared boulders and uneven stones. Six pilasters from the inner side of the wall were discovered. The remains of barracks were situated close to the fortification wall and their eastern half had been explored in the past. The barracks had a second floor supported by pillars arranged in rows. Tegulae and imbrices from the collapsed roof were discovered inside the barracks. The finds discovered on the floor included several fragmentary ceramic vessels, a bronze fibula, a lead rosette, a bronze finger-ring, a gilded silver appliqué and 65 coins of the 4th – 5th centuries AD, the latest ones minted by Leo I the Thracian. The barracks were destroyed by fire. The fortress most probably was destroyed during the Gothic invasions in the second half of the 5th century AD. Two Mediaeval strata were documented in Trench F4. A house was explored in the upper stratum, dated to the 11th – 12th century, judging from the pottery. Another Early Mediaeval house with two floor levels was explored in the lower stratum. The floor from the first construction period was situated over a layer of debris from the roof of an Early Byzantine building situated to the north of the barracks. A second Early Mediaeval house was explored, 3.43 m by 2.96 m in size, built of wooden posts and wattle-and-daub. A bottom of an oven was discovered in its northeastern corner and sherds of the 9th – 10th century were found.