There was a beer I had in Germany once, while on a roadtrip down to Munich for Oktoberfest. This particular beer was somewhere in Southern Germany (Munchengladbach, or thereabouts) and made by the monks. I don't recall what it was called or exactly where I had it (this was 25 years ago), but I know it was a doppelbock. Dark, thick and a little sweet, and probably about 13% ABV! Pretty delicious. The label had an image of two monks standing up with a bench stuck to their butts. The story I recall is that when fasting, drinking beer wasn't considered to be breaking their fast, and so they would make it really thick and strong. Liquid bread. They would know when it was finished by pouring some on a bench to see if it would stick. Obviously, there is some exaggeration in the myth here, but the story was good and the beer was, too.
And it was served, as I recall, at "cellar" temperature, which was somewhere between ice cold and warm.