The Divine Comedy of Dante Alighieri: The Inferno
CANTO XXXII.
The Ninth Circle--that of the Traitors, is divided into four concentric rings, in which the sinners are plunged more or less deep in the ice of the frozen Cocytus--the Outer Ring is Caïna, where are those who contrived the murder of their Kindred-- Camicion de' Pazzi--Antenora, the Second Ring, where are such as betrayed their Country--Bocca degli Abati--Buoso da Duera-- Ugolino, 241