POROS FORTRESS (Milen Nikolov – m_kotlenski@abv.bg) The fortress dated to Late Antiquity. It was located on Phoros Peninsula where the Roman mansio Pudizo was situated. The earliest mentioning of Poros is attested in a decree of the Patriarchate of Constantinople of 1270. The fortification wall was preserved up to 1.30 m in height. In 2008, finds and architectural structures of the 5th – 6th centuries AD were discovered. In 2013, a sector of the fortification wall, 280 m long, was explored. The wall was 2.90 m wide and its foundation was deep down to 1.30 m, constructed of roughly-cut stones bonded with mortar. Four rectangular towers were discovered. Towers Nos. 1 and 2 measured 10 m by 10 m and Towers Nos. 3 and 4 measured 6.60 m by 8.40 m. The walls of Towers Nos. 1, 3 and 4 were 1.85 m wide and the wall of Tower No. 2 was 3 m wide. A stratum 40 cm thick was documented in Tower No. 2, containing sherds of the 3rd – 6th centuries AD. Sherds of the 11th – 14th centuries were found close to the tower. Two strata were documented close to Tower No. 3: the upper one was 70 cm thick and contained sherds of the 3rd – 6th centuries AD and the lower one was 7 cm thick and contained sherds of the 3rd – 4th centuries AD. A pit containing material of the 4th – 6th centuries AD was discovered inside the tower and a Christian burial of a women with a child of the 12th – 13th century was explored. Several graves from a Christian cemetery of the 12th – 13th century were explored close to the tower. The architectural structures discovered in 2008 were not towers, as initially supposed, but rooms in a building with hypocaust of the second half of the 3rd – 4th centuries AD. Three buildings of the 6th century AD were documented above it, dated by coins minted from Justin I to Tiberius II Constantine. Three buildings were explored in the harbor. Building No. 2 dated to the 6th century AD. Building No. 3 dated to the second half of the 6th – beginning of the 7th centuries AD and consisted of several rooms. A layer of tiles from the collapsed roof and several dolia were discovered. The finds included two coins of the 6th century AD, a hoard of seven folles (two of them minted by Justin II and Sophia and by Phocas and Leontia) and a lead seal of the beginning of the 7th century AD. Building No. 4 dated to the 6th century AD and consisted of several rooms.