"There we found Plutus the great enemy"

(Canto 6, line 115)

Plutus, in Greek mythology, was the god of wealth, while Pluto was the king of the underworld, also called Dis. The opinion of many commentators is that since Lucifer, not Pluto, is assigned the role of king of the underworld in Dante's poem, this Plutus (Pluto in the original Italian) should refer to the god of wealth, especially as he stands guarding the entrance to the fourth circle, where souls guilty of greed and wastefulness are punished. Also, the appellation "the great enemy" to Plutus ("Pluto") is consistent with Dante's view that "the love of money is the root of all evil."