In addition to these six works, a seventh tragedy, Prometheus Bound, is attributed to Aeschylus by ancient authorities.
Since the late 19th century, however, scholars have increasingly doubted this ascription, largely on stylistic grounds.
Its production date is also in dispute, with theories ranging from the 480s BC to as late as the 410s.

The play consists mostly of static dialogue, as throughout the play the Titan Prometheus is bound to a rock as punishment from the Olympian Zeus for providing fire to humans.
The god Hephaestus, the Titan Oceanus, and the chorus of Oceanids all express sympathy for Prometheus' plight.
Prometheus meets Io, a fellow victim of Zeus' cruelty; and prophesies her future travels, revealing that one of her descendants will free Prometheus.
The play closes with Zeus sending Prometheus into the abyss because Prometheus refuses to divulge the secret of a potential marriage that could prove Zeus' downfall.

Prometheus Bound appears to have been the first play in a trilogy called the Prometheia.
In the second play, Prometheus Unbound, Heracles frees Prometheus from his chains and kills the eagle that had been sent daily to eat Prometheus' perpetually regenerating liver.
Perhaps foreshadowing his eventual reconciliation with Prometheus, we learn that Zeus has released the other Titans whom he imprisoned at the conclusion of the Titanomachy.

In the trilogy's conclusion, Prometheus the Fire-Bringer, it appears that the Titan finally warns Zeus not to sleep with the sea nymph Thetis, for she is fated to give birth to a son greater than the father.
Not wishing to be overthrown, Zeus marries Thetis off to the mortal Peleus; the product of that union is Achilles, Greek hero of the Trojan War.
After reconciling with Prometheus, Zeus probably inaugurates a festival in his honor at Athens.
In addition to these six works, a seventh tragedy, Prometheus Bound, is attributed to Aeschylus by ancient authorities. Since the late 19th century, however, scholars have increasingly doubted this ascription, largely on stylistic grounds. Its production date is also in dispute, with theories ranging from the 480s BC to as late as the 410s.
The play consists mostly of static dialogue, as throughout the play the Titan Prometheus is bound to a rock as punishment from the Olympian Zeus for providing fire to humans. The god Hephaestus, the Titan Oceanus, and the chorus of Oceanids all express sympathy for Prometheus' plight. Prometheus meets Io, a fellow victim of Zeus' cruelty; and prophesies her future travels, revealing that one of her descendants will free Prometheus. The play closes with Zeus sending Prometheus into the abyss because Prometheus refuses to divulge the secret of a potential marriage that could prove Zeus' downfall.
Prometheus Bound appears to have been the first play in a trilogy called the Prometheia. In the second play, Prometheus Unbound, Heracles frees Prometheus from his chains and kills the eagle that had been sent daily to eat Prometheus' perpetually regenerating liver. Perhaps foreshadowing his eventual reconciliation with Prometheus, we learn that Zeus has released the other Titans whom he imprisoned at the conclusion of the Titanomachy.
In the trilogy's conclusion, Prometheus the Fire-Bringer, it appears that the Titan finally warns Zeus not to sleep with the sea nymph Thetis, for she is fated to give birth to a son greater than the father. Not wishing to be overthrown, Zeus marries Thetis off to the mortal Peleus; the product of that union is Achilles, Greek hero of the Trojan War. After reconciling with Prometheus, Zeus probably inaugurates a festival in his honor at Athens.
Aeschylus