Saint Brieuc Cathedral, located in the city of Saint-Brieuc in Brittany, France, is a Roman Catholic cathedral dedicated to Saint Brieuc, the city's patron saint. Construction began in the 13th century and continued over several centuries, resulting in a mix of architectural styles, primarily Gothic and Romanesque. The cathedral features stunning stained glass windows and intricate sculptures, showcasing the artistry of its time. It serves as the seat of the Diocese of Saint-Brieuc and Tréguier and is an important historical and cultural landmark in the region, attracting visitors for its beauty and heritage.