Medea is a 1969 Pier Pasolini film based on the play by Euripedes. It stars Maria Callas. I have seen this and didn't watch it again for this post.
Youtube has it in pieces. part 1:
part 2, part 3, part 4, part 5, part 6, part 7, part 8, part 9, part 10
It's available in one piece at veoh if you want to download their player, which I plan on never doing again.
The New York Times says, ""Medea" is uneven, but I admire the reckless courage of its conception, even when it goes wrong."