XIIb/558/A-140

A military bunker located near Ostrava, Czechia, identified by the designation XIIb/558/A-140. This structure is part of the extensive network of fortifications built in Czechoslovakia during the interwar period as part of the country's defensive preparations against potential German aggression. The Czechoslovak border fortifications, constructed between 1935 and 1938, represented one of Europe's most advanced defensive systems of the era, featuring reinforced concrete bunkers, machine gun nests, and artillery positions along the country's borders.