HauntBound archive · catalog record
Reported phenomena — as catalogued
The 1838 powder magazine that survived a Civil War artillery barrage still stores something — staff call him Billy Boy Blue, a wronged soldier who asks visitors about objects he's never seen before.
900 State Capitol Drive, Baton Rouge, LA 70801
Research updated June 2026
Age
All Ages
Cost
Free
Free admission. Open Thursdays 9 AM–3 PM or by appointment.
Access
Wheelchair OK
Single-story stone structure on flat capitol grounds; paved paths
Equipment
Photos OK
Est. 1836 · U.S. Army Ordnance Depot and Powder Storage (1836–1861) · Confederate Seizure (January 1861) · Battle of Baton Rouge (August 5, 1862) · National Register of Historic Places (1973) · One of Two Surviving Arsenal Structures
The Old Arsenal Powder Magazine was constructed by the U.S. Army between 1836 and 1838 adjacent to the main Baton Rouge Arsenal and Ordnance Depot on what is now the Louisiana State Capitol grounds. The thick-walled stone structure was designed to store explosive powder safely, with a capacity of approximately 3,000 barrels. It is one of only two surviving structures from the original arsenal complex.
When Louisiana seceded in January 1861, Confederate forces seized the arsenal and its stores. Union troops retook Baton Rouge in May 1862 after the fall of New Orleans. On August 5, 1862, Confederate forces under General John C. Breckinridge launched an assault on the city — the Battle of Baton Rouge. The powder magazine absorbed artillery fire during the engagement and survived structurally intact, a fact the museum's exhibits still document.
The building was listed on the National Register of Historic Places on June 14, 1973, the same designation cycle that covered the adjacent Pentagon Barracks. It was subsequently restored and converted to its current use as the Old Arsenal Museum, operated by the Louisiana Secretary of State's office. The museum interprets the military and political history of the arsenal, the 1862 battle, and Louisiana's Civil War experience.
The site is also notable for its proximity to an undisturbed Native American ceremonial mound within the Capitol grounds, adding an additional layer of historical depth to the property.
Sources
The most specifically named figure associated with the Old Arsenal Museum is called Billy Boy Blue by those who have encountered him — described as a uniformed soldier, apparently from the Civil War era, who appears in the museum's interior. Accounts characterize him as a presence connected to a wrongful death, though the historical basis for this claim has not been independently documented.
A second reported figure is notable for its interactive quality: witnesses describe being approached by a figure in period dress who asks questions about ordinary modern objects — a watch, a phone, a piece of clothing — as if genuinely unfamiliar with them, before disappearing without warning. Both accounts come from staff and visitors rather than from published paranormal investigations.
The adjacent Arsenal Park has separately generated reports of soldier figures moving through the oak trees on the grounds, a phenomenon described in local journalism. The proximity to a Native American ceremonial mound within the Capitol grounds has led some accounts to layer additional narratives onto the site, though these remain undocumented at the primary source level.
Notable Entities
Explore one of only two surviving structures from the Baton Rouge Arsenal and Ordnance Depot inside the East Garden of the State Capitol grounds. Exhibits interpret the history of the arsenal, the Battle of Baton Rouge, and the powder magazine's role in storing up to 3,000 barrels of ammunition.
Every HauntBound history is researched from documented sources. We clearly separate verified historical fact from paranormal folklore.
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Louisiana's Old State Capitol at 100 North Blvd in Baton Rouge was built in the mid-19th century as a Gothic Revival structure on the bluff above the Mississippi River. It served as the state capitol until the early 20th century. During the Civil War, the building was occupied by Union forces and used as a hospital and prison for soldiers. The museum is currently operated by the Louisiana Secretary of State's office.
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