SOSTRA (Ivan Hristov – ivchristov70@abv.bg) The excavations continued in front of the eastern fortification wall of the second half of the 3rd century AD. A pavement towards the main gate of the castellum was documented, dated by coins of the 3rd – 4th centuries AD. Sectors of the so-called early wall were discovered; it was 1.90 m wide, built of stones bonded with mud, situated at 10 m in front of the eastern fortification wall of the castellum. This wall was later than the first fortification wall of the mid 2nd century AD. Probably, it was built during the second half of the 3rd century AD; it was not more than 1 m in height and was situated in front of the eastern and the northern fortification walls of the castellum. Room D in Building No. 7 situated behind the southern gate of the castellum was thoroughly explored. A layer of collapsed fragmentary sun-dried bricks of the second floor of the building was discovered. The finds included a ceramic jug, coins of the first half of the 3rd century AD, and a hoard consisting of iron tools (a reaping hook, picks, a hoe, chisels, a ploughshare and padlocks), two silver bracelets, two bronze bracelets and two silver earrings, dated to the end of the 4th century AD. A stone pavement with a kerb, parallel to the main road, was documented; a bronze plate of a plate mail and coins of the 3rd – 4th centuries AD were found over the pavement.