Cloaks were very common until about the late 19th C. The fibula style pin dates back to Roman times and you can still get them today if you're in to that sort of thing. That said... Pretty sure yours isn't Roman.
Frankly, it doesn't look like it's been in the ground 100+ years. If I HAD to make an ID on it, I'd call it re-enactment piece. But I'm just guessing...