PRESLAV (Georgi Maistorski – gmaistorski@gmail.com, Plamen Slavov) The building situated to the east of the northeastern corner of the fortification wall, was 12 m by 4.50 m in size and was constructed of timber material with a floor of mortar. Six postholes, 30 cm in diameter, which supported the structure, were documented. Horizontal wooden boards, 8 cm thick and 10 – 12 cm wide, were documented. The boards were arranged over a layer of clay and the mortar floor was plastered over them. The building probably served as a dwelling for the masons who constructed the fortress. It was destroyed by a fire. The finds from the building included iron and copper plates, a fragment from a horseshoe and a sherd from a small pot or a cup. Part of the eastern fortification wall of the Outer Town of Preslav was explored in Sector Northeast and a pavement was discovered, which testified to the probable existence of a postern. Sondages were carried out along the northern fortification wall of the Outer Town of Preslav. The fortification wall was not preserved, but the mortar plaster over its foundation was documented. The foundation of the wall was 70 cm deep. Proto-Bulgarian sherds were found. A fragment of a lead cross was found in Sondage No. 24. A section of the fortification wall, 1.50 m long, was discovered in Sondage No. 13 situated at 60 m from the northeastern corner tower. The trench for the construction of the fortification wall was dug out into an occupation layer of the 9th century AD.