Just north of Capalbio is the hamlet of Marsiliana d’Albegna, and overlooking that on a steep hill, is the Fattoria di Marsiliana castle and farm. It was built in the middle ages by the Aldobrandeschi, then under the control of Siena, then the Presidi, and finally the Grand Duchy of Tuscany. At the beginning of the 18th century it became the property of the Corsini princes of Florence, who still own it.

The Corsini were particularly cultured and enlighted. In 1730 the family patriach became Pope Clement XII at the age of 80, and set about founding museums and commissioning monumental works, including the Trevi fountain. In the 20th century, Tommaso Corsini saved numerous galleries and artworks from looting and bombing during the second world war, helped draft the country’s new constitutional charter after the war, and was a passionate advocate of modern agricultural techniques that transformed farming in Tuscany and Umbria. He also discovered, in 1908, by chance, the important Etruscan Necropolis of Banditella near his property, and then paid for and directed the archeological excavations.