This military bunker was built in mid 1920s, between the wars.
In 1923 it was decided to fortify Vilnius from all sides: to install combat bunkers with firing points around the city, to build ammunition warehouses, a connecting narrow-gauge railway line with bridges, roads and other infrastructure. During the next few years three types of fortifications were built in the Vilnius defense ring: bunkers, underground ammunition depots and above-ground ammunition depots. It was planned to group combat bunkers around Vilnius into 12 resistance centers. But only one of those was built - a complex of 4 underground facilities (including this bunker) at the Pūčkiori outcrop.
The bunker has an original three-pronged structure. To the right of the entrance there is a crew hideout, an underground corridor leads from it to the intersection of rooms, then steps up to the observation tower, and the left fork with an ammunition niche leads to the firing positions. They are closed, with a ceiling and a side window for lighting and ventilation.
None of the Vilnius defense ring structures were ever used for their intended purpose. During and after the war, the bunkers were used as hiding places or warehouses.
