A wonderful homage to art and architecture; more specifically, to the State Hermitage Museum of Saint Petersburg, here afloat (the titular ark), drifting in the sea of time, upon whose currents Russian history and memory are borne, fugacious and amorphous. Hazy, lush, sublime; it unfurls sinuously. An astonishing cinematographic achievement. The climax is spellbinding.
On an unrelated note: I'm going to Cannes!