EXPLORATIONS OF THE ‘LATE ANTIQUE BATHS’ SITE IN DEULTUM (Krasimira Kostova – kr.kostova@mail.bg, Elka Docheva, Maria Manolova–Voikova) The cultural stratum below the walls constructed of stones with a bonding medium of mud during the 5th – 6th centuries was explored. It contained traces of conflagration that happened in the first half of the 5th century AD. The flooring level of the hypocaust was discovered. The floor is partly preserved and consists of rectangular terracotta plates placed on a mortar plaster. The hypocaust consists of stone pillars supporting the floor. The trench was widened to the northwest with an additional area of 150 sq. m, which was excavated down to 2.60 – 3.95 m in depth. A small quantity of pottery was found in the layer containing building material from the baths. Some 50 tesserae of mosaics, three of them gilded, were discovered. The stratum containing traces of conflagration is 40 – 60 cm in thickness and was registered above all flooring levels of the baths. Coins of Arcadius, Honorius and Theodosius II were found in the stratum, which date the conflagration to the first half of the 5th century AD, the terminus ante quem for the use of the baths. During the second half of the 5th century AD, a warehouse was built over the ruins of the baths. Seven dolia, instruments, tools and pottery were found. During the construction of the warehouse, preserved walls of the baths were reused, its rooms were divided and new rooms were built. The foundations of the new rooms were constructed of stones with a bonding medium of mud and their walls were built of adobe. A roofing construction that collapsed because of a conflagration covered the cultural stratum of the end of the 5th – beginning of the 6th centuries AD. Coins of Iustinus II date the conflagration to the end of the 6th century AD. Most likely, it was result of the invasions of Avars and Slavs.