Osowiec Fortress

The fortress extends over 6.5 kilometers along the Biebrza River bank, incorporating four main fortification zones connected by a network of trenches and tunnels.

The Russian Empire constructed this defensive complex between 1882 and 1892 to protect its western borders against German expansion through the marshlands.

The fortress structures display traditional Russian military architecture with yellow and red brick facades incorporating classical elements from the 19th century.

Sections of the fortress within Biebrza National Park permit guided tours, while other areas remain restricted due to current military operations.

During World War I, Russian soldiers at this fortress continued fighting after a chemical attack, leading to the battle named Attack of the Dead Men.

Location: Osowiec-Twierdza

Inception: 1882

Founders: Russian Empire

Part of: WWI Eastern Front

GPS coordinates: 53.46861,22.64389

Latest update: May 28, 2025 11:42