You don't need to be of strong faith to appreciate the tranquil atmosphere of St. Louis Cathedral. Inquire when the next service is scheduled or when you can go for a wander through.
This principal church in Douar ech Chott comes recommended by many travelers, so make sure it features on your to-do list. Don't think the sightseeing ends there, however. There are many more options ready for you to discover after St. Louis Cathedral. La Goulette Beach, La Marsa Beach, and Byrsa Hill are close by.