I've been outlining such a thing for The-Story-That-Shall-Not-Be-Named, and I've got a few ideas for it
- Ranges from Renaissance times to cyberpunk-esque (essentially making it two things; its own genre and a subgenre)
- Alternate History
- Can be wholly realistic, or can include mysticism (especially if you wish to include old gods)
- Rome: Superior, Unfallen
Here's what I have written for Romepunk in a doc. Should you not wish to deal with The-Crazy-One, ignore this.
Of course, this is referring to "Antique Romepunk."
"Cyber Romepunk" is a bit more like this
Athens and the Hellenistic states come across as being the philosopher's land, the place of ultra-high quality and enlightenment. Rome, however, is the capital of it all.
All in all, Cyber Romepunk is Cyberpunk with Latin and Greek everywhere instead of Japanese.
I can't find too many pictures on this, and "Romepunk" as a whole is nonexistent, surprisingly. But here are some images I could find.