Fire
Well, duh. Considering that the whole play is happening because Prometheus stole fire, it's not surprising that "fire" is an important symbol. It's so important that it both starts and ends the pla...
Chains
The play's original Greek title is Prometheus Desmotes: "Prometheus in Chains," or "Prometheus Bound." So, chains, like fire, are there from the very beginning. But "chains" are just a symbol for c...