Taganrog Fortress built
1696 CE.
Shown on the map at 47.203°, 38.941°.
Taganrog Fortress (also The Saint Trinity fortress on Tagan-Rog Cape) was a star fort-style fortress built during the reign of Peter the Great and re-constructed by the order of Catherine the Great.
Text from the Wikipedia article Taganrog Fortress, licensed CC BY-SA 4.0.