Consecration of Russia to the Immaculate Heart of Mary

The consecration of Russia to the Immaculate Heart of Mary by a reigning pope was requested during a Marian apparition by Our Lady of Fátima on 13 July 1917, according to Lúcia dos Santos (Sister Lúcia), one of the three visionaries who claimed to have seen the apparition. Sister Lucia said that at different times the Blessed Virgin Mary had given her a message of promise that the consecration of Russia to the Immaculate Heart of Mary would usher in a period of world peace.

Source: Wikipedia — Consecration of Russia to the Immaculate Heart of Mary (CC BY-SA 4.0)