I can answer the last, directed by John Frankenheimer, and starring Burt Lancaster as LaBiche, a railway manager(?), the plot being as Paris falls to the Allies in 1944, one of the German generals decides to plunder the Louvre and take most of artwork back to Germany. The activities of les cheminots, or French railway workers sabotaging the railways is the basis of the film
You're right on this one, including the director (minuscule nitpick: I don't think it was the Louvre, particularly -- the German guy was particularly into modern art [which as a Nazi, he shouldn't have been -- the movement despised such art as "degenerate"], and targeted various museums specialising in same. The Train is the only one of the films in the question, which I've seen (several times): find it compulsive viewing, though some distress caused by the copious "carnage" visited on locomotives and trains !