* Paolo and Francesca are punished in the Second Circle for their sin of lust.
* Ulysses and Diomedes are punished in the Eighth Circle, specifically the Malebolge, for their sin of fraud.
* Brunetto Latini and Guido da Montefeltro are also punished in the Eighth Circle, specifically in the Malebolge, for their sin of flattery.
Let me know if you have any other questions about *Inferno*!