"A naked amber jewel that opens suddenly, rose-like, deep in the wide bay". (D.H. Lawrence) Thus, in the 1920s, the English novelist D.H. Lawrence describes Cagliari, a city of sun, stone and sea. Since then, the island's capital has only partially changed its appearance, keeping its ancient heart intact alongside the new and modern neighborhoods that have surrounded it since the post-war period. Placed in a privileged position for the presence of the sea, hills and ponds, Cagliari is the result of a pluri-millennial history that has left marks and traces throughout its territory; more or less visible signs and traces, more or less immediate, but in any case all evidence of the presence of the men who have alternated here. In fact, there are many peoples who passed or remained in Cagliari: Phoenicians, Romans, Vandals, Byzantines, Pisans, Genoese, Aragonese and Catalans, Spaniards, Austrians, Piedmontese. Everyone left something, which today we can trace in the buildings, in the streets, in the precious works of art preserved in churches and museums, in names, habits, in language.