Allegheny West in Philadelphia in Philadelphia County, Pennsylvania — The American Northeast (Mid-Atlantic)
Rear Admiral John Adolphus Bernard Dahlgren
United States Navy
“The Father of Modern Naval Ordnance”
His contribution to the design of naval ordnance and ship construction revolutionized the navies of the world.
This memorial is erected on behalf of a grateful Navy, by the officers and men of the U.S.S. Dahlgren, a guided missile frigate and the third proud ship to bear this illustrious name.
Dedicated on 15 April 1961, in the centennial year of the War between the States, in which Rear Admiral Dahlgren served the Union forces with distinction as Commander of the South Atlantic blockading squadron.
Erected 1961 by Officers and Men of the U.S.S. Dahlgren.
Topics. This historical marker is listed in these topic lists: Cemeteries & Burial Sites • War, US Civil • Waterways & Vessels. A significant historical date for this entry is April 15, 1961.
Location. 40° 0.169′ N, 75° 11.35′ W. Marker is in Philadelphia, Pennsylvania, in Philadelphia County. It is in Allegheny West. It can be reached from Ridge Avenue, on the left when traveling north. Marker is located in Laurel Hill Cemetery in section L Lot 5-56. Touch for map. Marker is at or near this postal address: 3822 Ridge Ave, Philadelphia PA 19132, United States of America. Touch for directions.
Regionally, this marker is in Southeast Pennsylvania. It is also in the American Northeast and in the Mid-Atlantic. Globally, it is in North America, the Western Hemisphere, the Western World, and the Anglosphere. Historically, it finds itself in what was once the Haudenosaunee (Iroquois) Confederacy, New Netherland, and one of the original Thirteen Colonies.
Other nearby markers. At least 8 other markers are within walking distance of this marker: Hector Tyndale (about 500 feet away, measured in a direct line); General Hugh Mercer (about 600 feet away); Laurel Hill Cemetery (about 600 feet away); Lieutenant Joseph Bonnell (about 600 feet away); Charles Thomson (about 600 feet away); Gatehouse (about 600 feet away); Chapel (about 600 feet away); a different marker also named Laurel Hill Cemetery (about 600 feet away). Touch for a list and map of all markers in Philadelphia.
Also see . . .
1. John A. Dahlgren. Wikipedia entry (Submitted on January 6, 2025, by Larry Gertner of New York, New York.)
2. The Life and Legacy of Admiral John Dahlgren. CIMSEC website entry (Submitted on January 6, 2025, by Larry Gertner of New York, New York.)
3. John Adolphus Bernard Dahlgren. Find A Grave website entry (Submitted on July 21, 2011, by Mike Wintermantel of Pittsburgh, Pennsylvania.)

Photographed by Bill Coughlin, March 15, 2011
5. Grave Stone of John Dahlgren
The grave stone of Admiral Dahlgren is located at the foot of the marker.
Sacred To the Memory of Mary G. Dahgren Wife of Leiut: J. A. Dahlgren, U.S. Navy Born in Philadelphia July 1817 And Departed This Life At Washington D.C. Dec. 10 1855 The Affectionate Wife, The Kind Mother The Youthful Daughter, The Sincere Friend Died as She Lived in the Hope of the Blessed Immortality through the Mercy of Her Redeemer.
John Adolph Dahlgren, Rear Admiral U.S.N. Born Nov. 1809 – Died July 1870

Photographed by Bill Coughlin, October 10, 2008
8. Dahlgren Gun
This gun was designed and built by Lt. John Dahlgren at the Naval Gun Factory, Washington, D.C. in 1850. A nine inch gun weighing approximately 9,000 lbs., it is capable of shooting a projectile of 150 lbs. They were used throughout the Civil War by the North and for some years later were the principal armament of American Naval Power. The Dahlgren Gun was principally used as a deck gun on Plymouth class Sloop-of-War vessels. This Dahlgren Gun is found in Oakland, NJ.
Credits. This page was last revised on January 6, 2025. It was originally submitted on March 16, 2011, by Bill Coughlin of Woodland Park, New Jersey. This page has been viewed 1,285 times since then and 27 times this year. Photos: 1. submitted on March 16, 2011, by Bill Coughlin of Woodland Park, New Jersey. 2. submitted on August 11, 2018, by Allen C. Browne of Silver Spring, Maryland. 3, 4, 5, 6, 7, 8. submitted on March 16, 2011, by Bill Coughlin of Woodland Park, New Jersey.





