Although nearly two thousand years separate The Odyssey and Dante & Inferno, both works are epic poems that:

Explore the relationship between humanity and the divine. Employ journey as a metaphor for maturation.
Reveal and teach cultural values about leadership.
Caution audiences about the appeal of temptation.
Contemplate the nature of immortality.
Compare and contrast how one of these topics is developed in The Odyssey and Dante & Inferno.

The Song of Roland and The Odyssey, though separated by thousands of years, are both epic works whose protagonists are warriors engaged in violent conflict: Roland is a medieval Crusader and Odysseus is on a long journey home after conquering Troy.

Additionally, both works:
Explore the relationship between humanity and the divine.
Reveal and teach cultural values about leadership.
Contemplate the nature of immortality.
Examine the moral and practical implications of loyalty and betrayal.
Compare and contrast how one of these topics is developed in The Song of Roland and The Odyssey.