Prometheus Unbound is a four-act play by Percy Bysshe Shelley first published in 1820. It is inspired by Aeschylus's Prometheus Bound and concerns Prometheus' release from captivity. However, unlike Aeschylus' version, there is no reconciliation between Prometheus and Zeus in Shelley's narrative. Shelley's play is closet drama, meaning it was not intended to be produced on the stage. In the tradition of other poets in the Romantic Poetry, Shelley wrote for the imagination, intending his play's stage to reside in the imaginations of his readers.