Saint-Brieuc Cathedral was the seat of the Bishopric of Saint-Brieuc, one of the nine ancient dioceses of Brittany, and continues to be the seat of the enlarged Bishopric of Saint-Brieuc-Tréguier, as it has been known since 1852. Some of the relics of Saint Brieuc himself, the 6th-century founder, are still kept in the cathedral. The present building however was built in the 14th and 15th centuries.
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The eight towns in south-eastern Sicily, including Ragusa, were all rebuilt after 1693 on or beside towns existing at the time of the earthquake which took place in that year. They represent a considerable collective undertaking, successfully carried out at a high level of architectural and artistic achievement. Keeping within the late Baroque style of the day, they also depict distinctive innovations in town planning and urban building. Together with seven other cities in the Val di Noto, it is part of a UNESCO World Heritage Site.
In 1693 Ragusa was devastated by a huge earthquake, which killed some 5,000 inhabitants. Following this catastrophe the city was largely rebuilt, and many Baroque buildings from this time remain in the city. Most of the population moved to a new settlement in the former district of Patro, calling this new municipality 'Ragusa Superiore' (Upper Ragusa) and the ancient city 'Ragusa Inferiore' (Lower Ragusa). The two cities remained separated until 1926, when they were fused together to become a provincial capital in 1927.