This is an illustration of the plot from Golubinaya kniga (Russian religious
verses) of Yegoriy, Princess and the Dragon. Heartless tsar decides to
sacrifice his daughter to the dragon as she converted to Christianity. She is
saved by Yegoriy the Brave sent by God. In exchange for life and peace of the
kingdom princess Oleksafiya demands the father to take the Christian faith and
to build three churches: in the name of the Mother of God, the Holy Trinity and
the Yegoriy the Brave (St. George). Roerich has depicted the most dramatic
moment: in the sinister twilight the dragon entwines the princess, but the
heavenly messenger had already raised his sword.