What are some old swears from medieval and renaissance times? I like to write as a little hobby, and would like some appropriate vocabulary for the more sailor-mouthed individuals.

For modern examples and context, you've got the classic "Fuck you" or "Fuck off" that's meant to be directed at another person that pisses you off. "Shit!", or "Fuck!" for when something goes wrong. And of course things like "Bitch" or "Shithead" that are simply direct insults.