I had the morning to explore a bit of Cagliari before picking up the rental car from the airport desk. This is the Palazzo Civico di Cagliari.
A short walk up Largo Carlo Felice is the Piazza Jenne.
Down again, this is the train station.
The buildings along Via Roma.
The Stazione Marittima di Cagliari.
Via Giuseppe Manno, the main pedestrian zone in Cagliari.