At the crossroads of two streets, it passes incognito. In the middle of the residences of the district, it could make one think of a rich bourgeois house. And yet the synagogue of Thionville welcomes its faithful at every celebration. The Star of David gives the synagogue its religious identity and allows its use and worship to be recognized. Its square structure gives it its outward appearance. Resolutely modern, it contrasts with other religious architectures. It is the secret of the synagogues, blending into the mass and taking on the appearance of the environment.