Just to add my 2 cents to this I think if someone tasted a beer of todays standard back in the day they would probably believe it tasted like crap or was weak in their standards.
There should be an archaic brew off; but then I believe it would turn into a beer fueled renaissance festival.....
I don't know. I think a Viking would have drank fermentated cow piss if it would get them good and drunk.
Life in the dark ages sucked, that's probably why they invented the still. I guess beer and wine couldn't quite get the job done for them.