Army and Corps Headquarters Markers
The marker is a 12 pounder heavy field gun. It was placed in 1913 by the Gettysburg National Military Park Commission.

Monument to Headquarters of Major General George Meade at Gettysburg
Text from the marker:
Headquarters of
Major General
George G. Meade
Commanding
Army of the Potomac
Location of the Army of the Potomac Headquarters Marker
The monument is south of Gettysburg west of the intersection of Taneytown Road and Hunt Avenue. It is 50 feet west of the Leister House. (39°48’52.1″N 77°13’56.5″W)
