Yes: Christopher Lee recorded a heavy metal album in which he pretends to be Charlemagne.
Because I’ve been enjoying Pendragon so much, I became curious about how to adapt a historical low-fantasy environment to Dungeons & Dragons. Turns out dudes already beat me to it twenty years ago with HR2: Charlemagne’s Paladins. I’ve been messing around with this book, and it is weird.
The sourcebook groups its rules options into Historical (pretty close to reality), Legendary (pretty close to most European epic tales), and Fantasy (pretty close to D&D-style fantasy). Under the middle-of-the-road Legendary set of rules, everybody’s human, and the only available classes are the Fighter, Paladin, Cleric, Thief, and Bard.
Even more critically, spells are very tightly restricted in terms of subject matter. Bards get Illusions, Enchantments, Conjurations, and Divinations only; (Christian) Clerics get Healing, Divination, Protection, and a tiny percentage to cast some other spells. So right there, nobody is tossing a fire ball to vaporize a horde of angry Visigoths, or teleporting from Aix-la-Chapelle to Roncevalles to send Roland some reinforcements.
But even more importantly, spells take “one unit” longer to cast. So a spell with a “casting time” of 4 segments, now takes 4 rounds; a spell that takes a turn to cast now takes an hour; etc. (The book doesn’t say it, but presumably the compensation is that the durations are similarly extended.) This has the effect of turning spells into ritual type performances, which is kind of cool. But it also means that it’s almost impossible to cast spells in the middle of combat. Magic is something you plan ahead of time; it’s not your “oh dang we need immediate crisis control” toolbox
As an experiment, I’ve been playing “solitaire” by running some sample characters through a randomly generated dungeon. Unsurprisingly, with the spell-casting classes crippled, the Fighter dominates. The game is still playable, and even still recognizable as Dungeons & Dragons, but there’s definitely a “Gladys Knight & the Pips” thing going on.
(In fact, this is exactly how things go in Pendragon: in 4e, you could play a magician or a miracle-worker, but what you can do is so limited that you really should be playing a knight instead.)
The whole thing makes me wonder what the idea was behind the Historical Sourcebooks. “It’s the D&D you know and love! Minus the races, the classes, most of the magic, most of the monsters, and all of the really cool treasures! Doesn’t that sound fun?”
To me, it kinda does, actually: there’s a viable sub-set of D&D in here. But I think the audience for it is likely very small.