Redemptoris Mater (Latin: Mother of the Redeemer) is an encyclical by Pope John Paul II delivered on March 25, 1987 in Saint Peter's Basilica in Rome.

Subtitled On the Blessed Virgin Mary in the life of the Pilgrim Church, the text addresses a number of topics in Mariology.

Redemptoris Mater, which the Pope called his "reflection on the role of Mary in the mystery of Christ and on her active and exemplary presence in the life of the Church"[1] was promulgated by John Paul II in connection with the Marian year declared for 1987/88.

This encyclical reflects the influence of Saint Louis de Montfort's Marian teachings on Pope John Paul II.

The pontiff singled out Saint Louis (who also inspired the pontiff's motto Totus Tuus) in this encyclical, saying that: The seeds of this encyclical may be traced to the statement by Pope John Paul II that as a young seminarian he "read and reread many times and with great spiritual profit" a work of Saint Louis de Montfort and that:[3][4] In the conclusion to the encyclical the pontiff stated: "The Church sees the Blessed Mother of God in the saving mystery of Christ and in her own mystery".