The Diocese of Saint-Dié is a Roman Catholic diocese located in northeastern France. Established in 1777, it is part of the ecclesiastical province of Strasbourg. The diocese covers the Vosges department and includes the city of Saint-Dié-des-Vosges, which serves as its administrative center. The diocese is known for its rich history and cultural heritage, including the Saint-Dié Cathedral, a prominent landmark. It serves a diverse population and is involved in various pastoral activities, education, and community services, reflecting the Catholic Church's mission in the region.