What are some good historical Halloween costumes (preferably, but not necessarily, female)?

I'm a freshman at a university where Halloween is nationally known to be a huge deal. But it's cold, and I don't want to walk around as a "y bunny" or a "y saloon girl" or something trashy like that. Last year I hand sewed an amazing Napoleon Bonaparte costume, but I obviously don't have quite that much time this year. Ideally, I'd continue with a totally ridiculous historical theme. I'd love to be a really accurate Athena or William Shakespeare. I could be Pam from The Office, because I've been told I look a lot like her, but that's boring. Maybe Rosie the Riveter? That would be easy, but recognizable. Or perhaps The Girl With a Pearl Earring? I want people to recognize who I am, but I will by no means be a y Nun or y Nurse.