Amazingly, as LiveJournal has remained online for some
Suspiciously humanoid aliens get stranded on Earth in the hey-day of swashing and buckling, are sanctuaried by some monks and get to participate in a good old-fashioned castle siege. Main characters: standard issue sitcom incompetent awkward male being helped to adjust to his new situation by a level-headed, socially astute female. Salvaged somehow by the sheer innocence with which the somewhat predictable punchlines are delivered and the occasional snappiness of some of the less predictable ones. To this day "you could do to lower your expectations/ up yours" is one of the funniest things I've ever heard.
After the first half or so of the story with its henpecked husbands and goose-pecked space-men Get Medieval's quality does peter off a bit, getting drawn into redundant space mobster characters and tedious exposition for a relatively dull SF background plot. Still, in its clean, unassuming charm, it's remained one of the better webcomics out there even a decade after its end.