The Keys to Happiness
Directed by Vladimir Gardin and Yakov Protazanov, this two-part epic was the most expensive Russian film at the time and smashed box office records. It is now considered lost, with only a 4 minute clip surviving.

2005

1924

1965

1924

2014

1945

1999

1994

2002

1915

2018

1943

1930

1960

1969

2017

1993

1998

2002

1997