The headquarters marker for Brigadier General Henry Hunt, Chief of Artillery for the Army of the Potomac is south of Gettysburg on Taneytown Road just south of the Leister House.

Monument to Artillery Headquarters of the Army of the Potomac

Looking west at the Henry Hunt headquarters marker with Cemetery Ridge in the background. The equestrian statue to General Meade can be seen just over the top of the ridge on the right.

From the monument:

Headquarters
of
Brig-General
Henry J. Hunt
Chief of Artillery
Army of the Potomac
July 2,3,4,5,
1863

Brigadier General Henry Hunt (USMA ’39) was a career Army officer from Detroit, Michigan. He was co-author of The Instructions for Field Artillery, published in 1861, the North’s guide to artillery operations throughout the war. Hunt’s expertise gave the Army of the Potomac a major edge in the artillery arm and played a decisive role in several battles.

Union Brigadier General Henry Hunt

Union Brigadier General Henry Hunt

 

Recommended reading:

The Man Behind The Guns:
A Military Biography Of General Henry J. Hunt,
Commander Of Artillery,
Army Of The Potomac

by Edward Longacre