"Phaedo" by Plato is a dialogue written in ancient Greece. In the final hours before his execution, Socrates debates the immortality of the soul and the nature of the afterlife with his friends. Through philosophical arguments with Pythagorean philosophers Simmias and Cebes, he explores whether the soul survives death and what awaits it afterward. The dialogue culminates in a mythological vision of the underworld and an account of Socrates' death.