Fiuggi is a comune in the province of Frosinone in the region of Lazio in central Italy.
Fiuggi, originally called Anticoli di Campagna, gained fame as early as the 14th century, when Pope Boniface VIII claimed his kidney stones had been healed by the mineral waters from the nearby Fiuggi spring. Two centuries later Michelangelo also extolled the virtues of the water that cured him of what he called "the only kind of stone I couldn't love." Soon Acqua di Fiuggi was being sent in bottles to all of Europe's royalty. 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.
- Today Fiuggi is a classic Italian hill town, beginning with its layout as two separate towns. Blanketing the slopes at 2,500 feet (760 m) above sea level is the medieval old town, called Fiuggi Città. At its feet is the 20th-century spa town, called Fiuggi Terme.
- Main attractions include:
- The tiny church of Santa Maria del Colle.
- The church of San Biagio, which even if it was rebuilt in the 17th century, it still preserves some fresco paintings of Giotto's scholars.
- The cast iron fountain in Piazza Piave, erected in 1907 to celebrate the arrival of running water in this town that owes its very existence to the abundant springs running below the hill.
- The ornate Palazzo Falconi, at the center of the ancient town. To this building it is linked the legend that also Napoleon Bonaparte has slept here.
- The former Grand Hotel, now the municipal theatre.
- The church of "San Pietro" built on the ruins of the ancient castle. The actual bell tower was one of the tower of the former castle.
- To the town is linked the legend of the stuzze, in which S. Biagio, in order to save the town from the assault of enemies' troop, let appear on the town fake flames in order to disguise the invading troops and let them believe that the town was already sacked. The miracle is today celebrated every 2nd of February when wooden pyramids are burned in the principal square of the town to remember the fact.