Grosseto is a city and comune in the central Italian region of Tuscany, the capital of the Province of Grosseto. The city lies 14 kilometres (9 miles) from the Tyrrhenian Sea, in the Maremma, at the centre of an alluvial plain on the Ombrone river.
It is the most populous city in Maremma, with 82,284 inhabitants. The comune of Grosseto includes the frazioni of Marina di Grosseto, the largest one, Roselle, Principina a Mare, Principina Terra, Montepescali, Braccagni, Istia d'Ombrone, Batignano, Alberese and Rispescia. The origins of Grosseto can be traced back to the High Middle Ages. It was first mentioned in 803 as a fief of the Counts Aldobrandeschi, in a document recording the assignment of the church of St. George to Ildebrando degli Aldobrandeschi, whose successors were counts of the Grossetana Mark until the end of the 12th century.Grosseto steadily grew in importance, owing to the decline of Rusellae and Vetulonia until it was one of the principal Tuscan cities. In 1137 the city was besieged by German troops, led by Duke Heinrich X of Bavaria, sent by the emperor Lothair III to reinstate his authority over the Aldobrandeschi. In the following year the bishopric of Roselle was transferred to Grosseto.
Piloni is a village in Tuscany, central Italy, administratively a frazione of the comune of Roccastrada, province of Grosseto. At the time of the 2001 census its population amounted to 152. Piloni is about 45 km from Grosseto and 10 km from Roccastrada, and it is situated in the heart of La Pietra and Farma nature reserves.
Saturnia is a spa town in Tuscany in north-central Italy that has been inhabited since ancient times. It is a frazione of the comune of Manciano, in the province of Grosseto. Famous for the homonym spa, its population is of 280.