Mysterion (film)
Mysterion is a 1991 documentary film by Finnish directors Pirjo Honkasalo and Eira Mollberg about a convent of Russian Orthodox nuns who have dedicated their lives to serving God. It is the first part of Honkasalos Trilogy of the Sacred and the Satanic, followed by Tanjuska and theDevils 1993 and Atman 1997. The film won the main prize at the Balticum Film amp TV Festival in Denmark in 1992.
Source: Wikipedia