SOSTRA (Ivan Hristov – ivchristov70@abv.bg) Archaeological excavations were carried out in front of the eastern fortification gate of Castellum Sostra. The finds included fragments from building ceramics and sherds of the 3rd century AD, coins of the beginning of the 3rd century AD, predominantly bronze coins of the Severan dynasty, a fragment of a votive relief showing a lion, a fragment of a column and a fragment from a gold finger-ring. A pavement of boulders which belonged to the Roman road Ulpia Oescus – Philippopolis was discovered in Sondage No. 6. A layer containing fragments of Late Antique building ceramics and sherds and a copper coin of Arcadius was discovered and another layer of the end of the 3rd century AD was documented beneath. A layer of small crushed stones was discovered above the Roman road and a hoard of 16 colonial bronze coins from Septimius Severus till Gordian III minted in Nicopolis ad Istrum, Marcianopolis and Hadrianopolis was discovered under it.