Dęblin Fortress built
1845 CE.
Shown on the map at 51.557°, 21.837°.
Dęblin Fortress (Polish: Twierdza Dęblin, originally Ivangorod Fortress, Russian: Ивангородская крепость) refers to the 19th century fortifications in the town of Dęblin, Poland. Part of the fortress is used as a museum and the area is owned by the Polish military.
Text from the Wikipedia article Dęblin Fortress, licensed CC BY-SA 4.0.