Tristan and Isolde
We watched this last night - very moving interpretation of the Tristan and Isolde legend. We know this story from the Wagner opera of course, but also recently we've been listening to the Teaching Company's lecture set on Arthurian legend (I'd link to it, but I can't seem to find it on the Teaching Company site - we check these lectures out of our library.)
I've had the DVD for the movie from Netflix for quite a while, but we wanted to wait to see it until after we heard the Teaching Company lecture on Tristan.
The movie seems true to the medieval period and the story is told in a realistic fashion (minus the love potion). Here is the review from Kenneth Turan.