Two or three, depending on how you count.
The first one isn't "a movie," exactly: the BBC series from 1975, Edward the King, aka Edward the Seventh--it seems to have had the former title in the U.S., the latter in the U.K. In thirteen one-hour segments (which actually seem to have been assembled from half-hour segments), it tells the entire life story of Edward VII from birth till death. I can't vouch for its historical accuracy to any great degree, but I think it is at least true to the known facts. Since Edward, like our current Prince Charles, spent most of his life in waiting, his mother is in most episodes, and Annette Crosbie's portrayal of Queen Victoria from young wife to old woman is a real tour de force. Timothy West's Edward (as an adult) is also excellent. The acting throughout is very fine (John Gielgud makes an appearance as Disraeli). Recommended if you have any taste for historical drama.
Kanal and Ashes and Diamonds are the second and third films in a trilogy by Polish director Andrzej Wajda. Made in the 1950s, and bearing noticeable stylistic similarities to the cinematic work being done in France and Italy at the time, they deal with the situation of Poland during and after the war.
Kanal is set during the Warsaw Uprising, and if you know anything about that you won't be surprised that it is an extremely grim work. It follows the doomed effort of a troop of Polish fighters--regular soldiers, and a few others, including two women--to escape the surrounding German army through the Warsaw sewers. I'm not giving anything away with the word "doomed" there, because you learn in the opening minutes that they are doomed. It's very powerful, and very deeply sad: you'll want to go out and grieve afterward. So why would I want to watch it? you say. Well, art is a strange thing, isn't it?
Kanal is on the surface a straightforward war story. Ashes and Diamonds is more complex. The story takes place just at the end of the war, and involves the situation then developing in Poland in which Nazi oppression was lifted and immediately replaced by Soviet oppression. But the political situation is less important than the personal situation of Maciek, a partisan who has survived the war against the Germans and is now attempting to assassinate a Russian official. It is the story of a man who has hardened himself against life but now wants to come in out of the cold, to use John Le Carre's famous metaphor. An intensely memorable story, though also not a sweet one.
There is a third film in the trilogy, A Generation, which seems to be generally considered inferior to the other two. Perhaps I'll give it a try someday. Has anyone seen it?