Fire of Moscow
The work on the remaining episodes of parts 3 and 4 resumed on 9 August. During the next months, the crew filmed in Mozhaysk, Kalinin and Zvenigorod. The final plot line to be shot was the Fire of Moscow; filming began on 17 October 1966. For four months prior to that, a plywood set was built in the village of Teryayevo, next to the Joseph-Volokolamsk Monastery. The entire construction, doused with diesel fuel, was burned to the ground as five fire engines stood nearby. Principal photography ended on 28 October 1966. On 28 December, the edited third film was approved by the studio. Work on the fourth and final one continued until early August 1967.