Chicago Reader review:
Andrei Tarkovsky's first major film (1966, though banned and unseen until 1971), cowritten by Andrei Konchalovsky, about a 15th-century icon painter. This medieval epic announced the birth of a major talent; it also stuns with the sort of unexpected poetic explosions we've come to expect from Tarkovsky: an early flying episode suggesting Gogol, a stirring climax in color. Not to be missed.
Here (and above) is the incredible opening scene.