Fort Constantin (Russia)

The city is located on the Kotlin Island, Gulf of Finland, Baltic Sea.

Currently the fort has no military use, the structures are in disarray, and the transport and tourism company Third Park [ru] tries to develop the territory as a tourist destination.

[1][2][3] In 1807 Emperor Alexander I of Russia signed a decree to additionally fortify Kronstadt expecting a war with Great Britain.

The initial parapet of the battery was made of pine timber filled with sand and stone, for speed.

It was made in two levels, hence the historical name "Double Southern Battery (Двойная Южная Батарея).