Entered from Birdcage Walk, this small museum is under the parade ground of Wellington Barracks. This is the headquarters of British Army's five Guards regiments: the Grenadier Guards, Coldstream Guards, Scots Guards, Irish Guards and Welsh Guards.

The museum, opened in 1988, has uniforms, medals and oil paintings on display, accompanied by martial music.  There are also displays and dioramas depicting the battles which the Guards have been involved in, from the English Civil War to the present day.