Return to the main page

Old Arsenal Museum

900 Capital Drive, Port Allen, LA 70767, USA

The Old Arsenal Museum, formerly known as the Powder Magazine, was built in 1838 and is the third such structure to stand on this site. Listed on the National Register of Historic Places, the site was of particular military importance due to its location on the Mississippi River. It later served as the main defensive position of the southwestern United States. The building has served as a powder magazine, library storage under Louisiana State University and later a veterinary infirmary. Governor Huey P. Long, while developing his grandiose plans for a new capitol, wanted to demolish the powder magazine, but was discouraged by Edward McIlhenny and other prominent citizens of the state. Since then, the arsenal has served the needs of the State Police and the National Guard, prior to its most recent use as a museum. The museum contains exhibits about the structure of the historic powder magazine and the history of the State Capitol grounds.


Satellite Map

Google Satellite Map of Port Allen, LA.

View Larger Map » | Get Directions »


From I-10 take Capitol Access/Governor's Mansion exit. Keep straight toward the State Capitol. The Old Arsenal is located on the State Capitol grounds, between the capitol and the governor's mansion.

Visitor Services

Self- guided tours

Plan Your Visit

Admission Fee



Tuesday-Saturday 9:00 A.M.-4:00 P.M.



Website »

Contact Us

Are you a site manager? Need to update your site? Want to sign up? Have photos to share?


Our Sponsors

Powered by Blackbaud
nonprofit software