1. Charon

2. Limbo
The concept of Limbo--a region on the edge of hell (limbus means "hem" or "border") for those who are not saved even though they did not sin--exists in Christian theology by Dante's time, but the poet's version of this region is more generous than most. Dante's Limbo--technically the first circle of hell--includes virtuous non-Christian adults in addition to unbaptized infants.

3. More Limbo
We thus find here many of the great heroes, thinkers, and creative minds of ancient Greece and Rome as well as such medieval non-Christians as Saladin, Sultan of Egypt in the late twelfth century, and the great Islamic philosophers Avicenna (Ibn Sina) and Averroës (Ibn Rushd). For Dante, Limbo was also the home of major figures from the Hebrew Bible, who-- according to Christian theology--were "liberated" by Jesus following his crucifixion

4. Even More…
Among the magnanimous shades in Limbo is a distinguished group of four classical poets--Homer (8th century B.C.E.), Horace (65-8 B.C.E.), Ovid (43 B.C.E C.E.), and Lucan (39-65 C.E.)--who welcome back their colleague Virgil and honor Dante as one of their own (Inf ). The leader of this group is Homer, author of epic poems treating the war between the Greeks and Trojans (Iliad) and Ulysses' adventurous return voyage (Odyssey).

5. Dante’s Idols
Although Dante had no direct familiarity with Homer's poetry (it wasn't translated and Dante didn't read Greek), he knew of Homer's unsurpassed achievement from references in works by Latin writers he admired. Dante knew works of the other three poets--each wrote in Latin--very well, particularly Ovid's Metamorphoses (mythological tales of transformations, often based on relations between gods and mortals) and Lucan's Pharsalia (treating the Roman civil war between Caesar and Pompey); Horace was best known as the author of satires and an influential poem about the making of poetry (Ars poetica). The vast majority of characters and allusions from classical mythology appearing in the Divine Comedy derive from the works of these writers, primarily those of Ovid and Lucan in addition to Virgil.

6. Canto 4 The Harrowing of Hell

7. Among Christians, descendit ad inferos is perhaps the most controversial part of the Apostles Creed; some believers are disturbed by the doctrine's assertion that when he died, Jesus went to Hell.

8. In the New Testament, two passages of 1 Peter alone affirm the doctrine, which is otherwise unparalleled: 1 Peter 3:19-20 says that Jesus "went and made a proclamation to the spirits in prison, who in former times did not obey, when God waited patiently in the days of Noah..."[1] Similarly 1 Peter 4:6 says that the gospel was "proclaimed even to the dead...”

9. Good and Evil +Earthquake

10. Aristotle
"The master of those who know" (Inf ). So respected and well known was Aristotle in the Middle Ages that this phrase is enough to identify him as the one upon whom other prominent philosophers in Limbo-- including Socrates and Plato--look with honor. Dante elsewhere follows medieval tradition by referring to Aristotle simply as "the Philosopher," with no need of additional information.