Monceau on Flickr Fort St. John (Spanish Fort). Established by Colonial French in the early 18th century. Rebuilt by the Spanish - 1779. American restoration - 1808. Built to protect New Orleans from attack by way of Lake Pontchartrain. Beauregard Avenue, New Orleans, LA by Louisiana Department of Commerce and Industry Colour: brown Wikimedia: Flickr: [geolocate this address]