Andrei Tarkovsky's 1966 almost-a-biopic film about the artist Andrei Rublev was suppressed almost before it came out, but many things with any merit were in Soviet Russia so it's not that surprising. Eventually Martin Scorsese found a copy of the film and brought it out of Russia, and that copy is where the Criterion Collection edition comes from. The film is quite the trip, and a long one, but thought-provoking nonetheless.