Slavskoye (Russian: Сла́вское; German: Kreuzburg in Ostpreußen; Polish: Krzyżbork; Lithuanian: Kryžbarkas) is a settlement in the Bagrationovsky District, Kaliningrad Oblast, Russia, located 20 kilometers (12 mi) south of Kaliningrad.

In 1440 the town joined the anti-Teutonic Prussian Confederation, at the request of which Polish King Casimir IV Jagiellon signed the act of incorporation of the region to the Kingdom of Poland in 1454.

[5] The town suffered damages in the Polish-Teutonic War of 1519–1521, which broke out after the Grand Master of the Teutonic Order refused to pledge allegiance to Poland.

The war resulted in the secularization of the Teutonic Knights in 1525, and the establishment of the Duchy of Prussia, which remained a fief of Poland.

It was badly affected by the Napoleonic Battle of Eylau in February 1807 and almost totally destroyed by a fire catastrophe on May 10, 1818, when 152 buildings burned down.