The Monuments Men is a 2014 film produced and directed by and starring George Clooney. It also stars Matt Damon, Bill Murray, and John Goodman. It's based on a non-fiction book that tells about the WW2 soldiers who rescued works of art stolen by the Nazis. This was a nice enough film, enjoyable and well worth watching. Once. I can't imagine I'll ever watch it again, but I'm glad to have seen it.
As many of the reviews point out, this movie is based on a true story. I don't understand people who mistake films that have a basis in fact for true representations of historical fact, but apparently such people exist. Just know that there were soldiers whose job it was to preserve cultural artifacts during WW2 and enjoy the movie as the entertainment it is. Want to know the real story? Talk to some of the people who were actually there while you still can, or read some history books.
Slate critiques the movie's accuracy. Rolling Stone has a positive review. EW gives it a C-. NPR concludes, "There's lots of information, some nice images, plenty of earnest sermonizing about culture and almost no suspense, or tension, or character development, or structure. Or, well, art."
Roger Ebert's site says, ""The Monuments Men" tests the proposition that an appealing cast can put almost any script across. ... heart alone does not a good film make." Rotten Tomatoes has a critics score of 31%, though the audience score is higher.