What is "polessk"

Polessk , prior to 1946 known by its German name Labiau (; ), is a town and the administrative center of Polessky District in Kaliningrad Oblast, Russia, located northeast of Kaliningrad, the administrative center of the oblast, at the junction of a main road and a railroad at the Deyma River, shortly before it enters the Curonian Lagoon. Population: 4,744 (1885).