Wikipedia
Gradoli is a comune (municipality) in the Province of Viterbo in the Italian region Latium, located about northwest of Rome and about northwest of Viterbo.
Gradoli sits on a tuff hill in the Monti Volsini area, a few kilometers from the Lake Bolsena. It is home to a palace which was owned by the Farnese family; it was commissioned by Pope Paul III to (allegedly) Antonio da Sangallo the Younger on the site of the medieval castle. Of the castle, only few traces remains, including a defensive tower, the entrance arch and few parts of the walls; its ditch has been now transformed into roads and squares. Sangallo also designed the nearby church of Santa Maria Maddalena.
Gradoli borders the following Comuni: Bolsena, Capodimonte, Grotte di Castro, Latera, Montefiascone, Onano, San Lorenzo Nuovo, Valentano.