Fort Konstantin

Fort "Konstantin" in Kronstadt, located on the southern fairway of the Gulf of Finland, grew out of a wooden battery armed with 36-pounder and 30-pounder cannons. In 1870, a pavilion for an optical rangefinder with a rotating part was built here, which was connected by underwater cables to Forts "Pavel I" and "Alexander I" for concentrated fire. During the reconstruction of 1896–1901, a concrete battery for eight 11-inch guns appeared on the right flank, and on the left flank, two "disappearing" guns of the Pauker system with steam lifting mechanisms were installed.