Zrin Castle was first mentioned in the 13th century as a fortress ruled by the Babonić clan. Between 1328 and 1347, it was possessed by the members of Iločki family. In 1347, King Louis I the Great bestowed the fortress to the noble Šubić family who then changed their family name after it, becoming the Zrinski. It remained in their possession until the Ottoman invasion and conquest of the region, which led to the fortress falling to them on 20 October 1577. It wasn't until 1718 that the castle was retaken from the Ottomans.References:
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.