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 - The Fiuggi Water.
The passage describes how Acqua di Fiuggi's fame grew over time, from being sent to royalty to becoming a popular destination for spa tourism. The King of Italy recognized the importance of this water source by renaming a town after it.