The document summarizes information about the city of Cagliari, Italy and its municipalities and districts. It notes that Cagliari has a total urban area of 490.5 square kilometers containing over 369,000 inhabitants across the city and 8 surrounding municipalities. It describes the historical center districts of Castello, Marina, Stampace and Villanova and some of the modern districts like Is Mirrionis, San Michele, Sant'Elia and Tuvixeddu-Tuvumannu.