Plio-Quaternary Magmatism in Italy: An Introductory Overview -- The Tuscany Province -- The Intra-Apennine Province -- The Roman Province -- The Ernici-Roccamonfina Province -- The Campania Province, Pontine Islands, and Mount Vulture -- The Aeolian arc -- The Sicily Province -- Sardinia and the Southern Tyrrhenian Sea -- Petrogenesis and Geodynamics in Italy.Central-Southern Italy and the Tyrr…