Perceval
Perceval le Gallois (original)
Filled with wonder at the sight of shining armor of a group of knights he has mistaken for angels, naive Perceval immediately solves the mystery of his destiny: he will become one of King Arthur’s knights. Valiant astride his horse, he rides from one ordeal to another, obsessed with a dream.
Starring Fabrice Luchini, André Dussollier, Solange Boulanger, Catherine Schroeder, Francisco Orozco, Deborah Nathan, Alain Serve, Daniel Tarrare, Pascale Ogier, Nicolaï Arutene
Watch "Perceval" on Mubi released in 1978. It's a drama and history movie, and has a rating of 6.9 out of 10 from Imdb which is usually fine for this kind of movie.