Anagni (anc. Anagnia), a town of Italy, about 40 m. S. E. of Rome; pop. about 7,500. Anagnia was one of the most ancient cities of Latium, the capital of the Hernici, and an early antagonist of Rome. It is the residence of some of the most powerful families of Italy, and it has given birth to several Roman pontiffs, among others to Gregory IX., Alexander IV., and Boniface VIII.