Which monument at the foot of Congress Column is in dedication to the services of an unknown soldier and to the common memories of all soldiers killed in any war?
Congress Column:  At the top of the column is a statue of Belgium's first monarch, King Leopold I, and the pedestal is surrounded by statues personifying the four freedoms guaranteed under the Constitution while the Belgian Tomb of the Unknown Soldier is at the foot of the column. Tomb of the Unknown Soldier: The Tomb of the Unknown Soldier refers to a monument (cenotaph) in dedication to the services of an unknown soldier and to the common memories of all soldiers killed in any war.
Tomb of the Unknown Soldier