Giannutri

thumb|270px|Map of the Tuscan Archipelago Giannutri () is a small island in the Tyrrhenian Sea off the coast of Tuscany, Italy; it is the southernmost island of the Tuscan Archipelago and it is a frazione of the comune of Isola del Giglio in the Province of Grosseto.

==Geography== Giannutri was known as Dianium by the Romans and Artemisia, Αρτεμησία by the Greeks; it has a crescent moon shape which forms the Gulf of Spalmatoio and is placed at south east from the Isola del Giglio and from Porto Ercole. The island has a coastal perimeter of , is stretched approximately from Punta del Capo Rosso to Punta Secca (north-south) and from Punta San Francesco to Punta della Salvezza (west-east). The soil is calcareous and has a rocky and rugged coasts with inlets and caves mainly in the southern part interrupted only by two beaches called Cala dello Spalmatoio (on the north-east) and Cala Maestra (on the north-west) where the dockings are. The island landscape has three hills: Poggio del Cannone (83 m) and Monte Mario (78 m) in the northern part and Poggio Capel Rosso (93 m), the highest, in the south where the lighthouse is.