The first Christian church was probably a wooden church. Of this church there is no trace, but the baptismal font in the Church today has probably belonged to this church. In the 1220s a new stone church of considerable size was built in round-headed Romanesque style and consisted of a nave with four pillars, chancel with two cross-arms and apse, an extension in the rear of the chancel where the altar was placed. A large tower in the west would be part of the building, but it never came to execution. The nave is left intact to this day. Lau church is the island’s largest country church. It is famous for its unique acoustics.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.