We were staying near the Gare train station, so this was not as much of a walk for me as it might be for some. My timing was also perfect (not planned) as I arrived during the time of a service going on inside. This was around 11:30 or so. After the service, I walked all the way around the church and at a certain point, a security guard was telling everyone to leave because they were locking the church and the gates. Therefore, I would check to see if there are certain times it's open to the public. Surprisingly not as big inside as you would think, but has some beautiful elaborate painting on the walls of the alter.