Prometheus Unbound (Ancient Greek: Προμηθεὺς Λυόμενος, Promētheus Lyomenos) is a fragmentary play in the Prometheia trilogy attributed to the 5th-century BC Greek tragedian Aeschylus, thought to have followed Prometheus Bound. Prometheus Unbound was probably followed by Prometheus the Fire-Bringer. It is concerned with the torments of the Greek mythological figure Prometheus who defies the gods and proceeds to give fire to humanity (theft of fire), for which he is subjected to eternal punishment and suffering at the hands of Zeus. It inspired the play of the same title by Percy Bysshe Shelley.