Of course, Leone's first movie A Fistful of Dollars was basically a straight-up (if not official) remake of Akira Kurosawa's Yojimbo, which, while a samurai movie, was Kurosawa's tribute to westerns. It had a lot of the same attitudes of the spaghetti westerns already in place.
And, of course, Yojimbo was basically a samurai version of Dashiel Hammett's Red Harvest. And so on, and so forth.
Speaking of stuff like this. Can I get a little help? I'm trying to come up with a list of movies that are basically classic stories retold.
I have stuff like Twist, 10 Things I Hate About You, Scrooged...but then I get stuck in Shakespeare and can't get out (West Side Story, My Kingdom, My Own Private Idaho, Scotland, PA) and I'd like a little more diversity.
Not straight up shooting a play or a work of literature, but a different take on a popular tale.