The St. Louis Cathedral or the Cathedral-Basilica of St. Louis King of France is the oldest Catholic cathedral in the United States that is continuously used today. It is properly maintained through ongoing conservation and restoration that prevents it from the threat of aging.

The site has been serving as a place of worship for churches on the site since 1727, even before the current cathedral was built. It was originally built for Louis IX, the sainted King of France and it was the first building in the city that utilized the brick-between-posts construction, which was used as an effective building method until the middle of the 19th century. Initially small, the church served as the place of baptism for the children of colonists and slaves. Under the church, several remains of certain people were buried as well.

After a calamity, the church had to be rebuilt in 1789. It now featured a central tower that added grace and dignity to the cathedral. In 1844, a 2-story fa?ade was also added. And because some of its walls are beginning to crack and the cathedral itself is starting to show signs of aging, a restoration and reconstruction process was done.

Today, the cathedral, which is now a National Historic Landmark, continues to become the central point of New Orleans especially in its great history.