The remains of a 17th century Jesuit house of worship, the ruins of the Church of St Paul are an iconic landmark in the city. Proof of the strength and history of Christianity in the region, it had a multitude of beautiful stone sculptures and other engravings. The church was destroyed by a fire in the eighteenth century and all that remains is the southern façade. Declared a UNESCO World Heritage Site, the façade is now reinforced and visitors can even walk up to the top of it. Do not be put off by the fact that only one wall remains as the Church has a symbolic significance that makes a visit here mandatory.