Fiuggi (Central-Northern Latian dialect: Fiuio) is a comune (municipality) in the province of Frosinone, in the Italian region of Latium.

Not until the turn of the 20th century did it become fashionable to make pilgrimages to spa towns, and it was around this time that the King of Italy renamed Anticoli in honor of its most celebrated attraction – the Fiuggi Water.

Unlike its neighbors, Anticoli di Campagna provided a source of revenue through the sales of its miraculous waters, and so it was often "bestowed" upon noble families in payment for services rendered.

These upper-class outsiders slowly covered the original medieval walls with painted plaster similar to that found in present-day Rome, changing the appearance of the town.

[citation needed] In November 2024, the foreign ministers of the EU met in Fiuggi, resolving to support a ceasefire between Israel and Hezbollah.