What jobs did people do in medieval Europe? Here's a list, broken down by category. Criminals had jobs too:
silk-snatcher - one who steals bonnets
stewsman - probably a brothel keeper - "since the words stew and stewholder both mean a bawd, I'm guessing that a stewsman would be a brothel-keeper as well. Whether bawdry counts as a criminal activity varies at different times and places."
thimblerigger - a professional sharper who runs a thimblerig (a game in which a pea is ostensibly hidden under a thimble and players guess which thimble it is under)
(via @zachklein)