Dante Alighieri on punishment about being disloyal?

Disloyalty in Dante's Inferno was portrayed as deliberate betrayal or treason in the worst cases if to one's Lord or country.

Those sinners of disloyalty and betrayal were found in the lowest level of Hell in the Inferno. Here traitors are distinguished from the "merely" fraudulent in that their acts involve betraying a special relationship of some kind. There are four concentric zones of traitors, corresponding in order of seriousness, to betrayal of family ties, betrayal of community ties, betrayal of guests, and betrayal of liege lords. In contrast to the popular image of Hell as fiery, the traitors are frozen in a lake of ice. This directly reflects Dante's view of disloyalty and betrayal as being the worst sin that is punished to the full extent in Hell.