The Gordon Monument is a neoclassical monument to a slain warrior on the battlefield of Waterloo. The person commemorated is Lt Colonel Sir Alexander Gordon.
It was erected in 1817 by the siblings of the deceased who included a future Prime Minister, Lord Aberdeen.
The monument takes the form of a severed column, or colonne brisée to use the French term, reached by a flight of steps.
Wikipedia https://en.wikipedia.org/wiki/Gordon_Monument
Address Chaussée de Charleroi, 1380, Belgium
Coordinates 50°40'46.453" N 4°24'42.992" E