Atlantis
Pillars and old walls still stood of what was once the bronze age palace much of them engraved with pictures of life during that time period. though very impressive, captain knew that they weren't here on vacation.
Nine Lives, One Disaster
Pip mentioned, “you know even the arians are in what you call the bronze age. this is what, the steel age?” purple chuckled and answered, “yeah, something like that. near the end of the steel age if i remember correctly.