The VIII.b/81a/B is a military bunker located in Czechia, near the coordinates 49.492995,13.241473. This structure appears to be part of the extensive fortification network built in Czechoslovakia during the interwar period and World War II era. The designation suggests it was part of a systematic numbering system used for military installations in the region.
Czechia's strategic location in Central Europe made it an important area for military defense planning during the 20th century, with various fortifications constructed along its borders and key terrain features.