Why does Dante have greek mythological characters in hell?

Dante incorporates characters from Greek mythology into his vision of Hell to emphasize their importance and influence in shaping Western culture and literature. By including figures like Homer, Achilles, and Ulysses, Dante connects classical literature with his Christian worldview, highlighting the continuity of human experience across different belief systems. Additionally, these characters serve to enrich Dante's narrative by providing additional layers of symbolism and complexity to his exploration of sin and punishment.