Arsenal Park — Old Powder Magazine

The federal government built this powder magazine in 1839 to store munitions for the Army garrison at Baton Rouge — Baton Rouge became Louisiana's capital a decade later, in 1849, and the nation needed ordnance close to the new seat of power. It is one of the oldest surviving government structures in Louisiana. When Louisiana seceded in 1861, state forces seized the magazine. After the war, the brick building served briefly as a state penitentiary before reverting to ceremonial quiet. It stands now in Arsenal Park, shaded by live oaks older than the structure itself. The trees root deeper than the conflicts that once turned over control of the powder stores within. Listed on the National Register of Historic Places since 1978, the magazine is a short walk from the Old State Capitol — close enough to trace a line between federal power, secession, defeat, and what the city chose to preserve. The oaks frame it. Walk under them.