The Dahlgren Chapel, built about 1881 in Turner's Gap on South mountain by
Madeline Vinton Dahlgren, the widow of Admiral John Dahlgren, US Navy.
Turner's Gap, South Mountain, Maryland

Rear Admiral John Dahlgren on the USS Pawnee in Charleston Harbor, June 1865
standing next to a Dahlgren gun which he designed by improving previous artillery models.
Courtesy of the US Library of Congress