On Sept. 6, 100 years after its first premiere, Dziga Vertov’s first film, “Anniversary of the Revolution,” had its second Moscow premiere at the Oktyabr Theater. The film had been thought to be lost, but film historian Nikolai Izvolov found it in pieces in the state film archives and painstakingly restored it and put it back together.

The film, called the first full-length documentary film ever made, covers the period from the February Revolution through the start of the Civil War and ends with a vignette of life on an early collective farm. Vertov did not do any of the filming himself. The 22-year-old filmmaker gathered footage shot by other cinematographers and compiled the two-hour film in a little over a week using 20 film editors.