an ancient Russian city on the upper course of the Bug River. Remains of the ancient city have been discovered at an archaeological site with a burial mound near the village of Podgortsy, L’vov Oblast, Ukrainian SSR.
Plesnesk is mentioned in the chronicle under 1188 and 1233 and in the Tale of Igor’s Campaign. Archaeological excavations have established that a castle was built there at the end of the tenth and the beginning of the 11th century and that a settlement at the site predated the construction of the castle. In the 12th century, Plesnesk was the economic center of a rural district and a large (160 hectares) and strongly fortified city of the Galician-Volynian Principality. After the invasion of Rus’ by the Mongol Tatars in the 13th century, Plesnesk was deserted. Its name has been preserved in the name of a modern khutor (farmstead).