When Russian POWs began building four casemates around the tower in the spring of 1942, they did everything they could to make it resemble a church tower, including a metal cross on the top and a painted bell.
Deception
Traces have since disappeared, but the plan worked: Allied pilots did not drop bombs on the bunker installation, and they were also confused by the false orientation point. After all, the tower was inspired by the church tower of Mardyck, closer to Dunkirk.