As a memorial to the Belgian victims of World War I, an unknown soldier was buried at the foot of the monument on 11 November 1922.
This unknown soldier was selected out of five unidentified soldiers from different battle sites by Raymond Haesebrouck, a veteran blinded in battle.
The tomb is surmounted by an eternal flame.

After World War II, a second memorial plaque was added to the monument to honour the Belgian victims.
In 1998, a third memorial plaque was dedicated to the Belgian soldiers killed in the service of peace since 1945.
As a memorial to the Belgian victims of World War I, an unknown soldier was buried at the foot of the monument on 11 November 1922. This unknown soldier was selected out of five unidentified soldiers from different battle sites by Raymond Haesebrouck, a veteran blinded in battle. The tomb is surmounted by an eternal flame.
After World War II, a second memorial plaque was added to the monument to honour the Belgian victims. In 1998, a third memorial plaque was dedicated to the Belgian soldiers killed in the service of peace since 1945.
Congress Column