Naples is the capital of the Italian region Campania and the third-largest municipality in Italy, after Rome and Milan. Naples is one of the oldest continuously inhabited cities in the world. Bronze Age Greek settlements were established in the Naples area in the second millennium BC. Naples' historic city centre is the largest in Europe and is listed by UNESCO as a World Heritage Site. Naples has long been a major cultural centre with a global sphere of influence, particularly during the Renaissance and Enlightenment eras. In the immediate vicinity of Naples are numerous culturally and historically significant sites, including the Palace of Caserta and the Roman ruins of Pompeii and Herculaneum. Culinarily, Naples is synonymous with pizza, which originated in the city.