Roman Pontiffs on Mary as Mediatrix:

Treasury of All Good Things
1. “God has committed to her the treasury of all good things, in order that everyone may know that through her are obtained every hope, every grace, and all salvation. For this is his will, that we obtain everything through Mary.” and “God has committed to the Blessed Virgin Mary the treasury of all good things in order that everyone may know that through her are obtained every hope, every grace and all salvation.” (Pius IX: Encycl., Ubi primum, February 2, 1849.) — [p. 12, number 12; p. 18, no. 38]

Only Through Thee
2. “O Virgin most holy, none abounds in the knowledge of God except through thee; none, O Mother of God, obtains salvation except through thee, none receives a gift from the throne of mercy except through thee.” (Leo XIII: Encycl., Adiutricem populi, September 5, 1895.) — [p. 12, no. 13]

No One Goes to CHrist Except Through His Mother
3. “With equal truth it may be said that of the great treasury of all graces given to us by Our Lord—for grace and truth came by Jesus Christ—nothing comes to us except through Mary’s mediation, for such is God’s Will. Thus, as no man goes to the Father but by the Son, so no one goes to Christ except through his mother.” (Leo XIII, Encycl., Octobri mense, September 22, 1891.) — [pp. 13,14, no. 19]

With Mary and Through Mary
4. “If it is impossible to separate what God has united, it is also certain that you cannot find Jesus except with Mary and through Mary.” (St. Pius X: Allocution to the Franciscans, November 12, 1910.) — [p. 14, no. 20]

 

The "Our Lady of the Sign-Ark of Mercy" is the largest Monstrance in the World.

Our Lady of the Rosary

5. “Every day, as the Church herself recommends, priests will recite the Holy Rosary, which, by proposing for our meditation the mysteries of the Redeemer, leads us to Jesus through Mary.” (Pius XII: Exhortation, Menti nostri, September 23, 1950) — [p. 14, no. 23]

What We Owe the Virgin Mary
6. “As the various mysteries present themselves one after another in the formula of the Rosary, for the meditation and contemplation of men’s minds, they also make clear what we owe to Mary for our reconciliation and salvation.” (Leo XIII: Encycl., Fidentum Piumque, September 20, 1896.) [pp. 15,16, no. 29]

All Hope
7. “All our hope do we repose in the Most Blessed Virgin, in the all-fair and immaculate one who has crushed the most cruel serpent’s poisonous head and brought salvation to the world.” (Pius IX: Apost. Const., Ineffabilis Deus, December 8, 1854.) — [p. 18, no. 39]

The Mediatrix of Our Salvation
8. “O Holy Mother of God; to thee we lift our prayers for thou, powerful and merciful, art the Mediatrix of our salvation.” (Leo XIII: Encycl., Jucunda semper, September 8, 1894.) — [p. 19, no. 43]

Through the Mater Dei
9. “None, O Mother of God, obtains salvation except through thee, none receives a gift from the throne of mercy except through thee.” (Leo XIII: Adiutricem populi, September 5, 1895) — [p. 19, no. 44]

I Stand With the Catholic Church: 10 Pictures in Defense of the Church

Mary is the Mediatrix and the Dispenser of Graces
10. “Whenever we speak of Mary or speak to her, let us not forget that she is really our Mother, for through her we received divine life. She gave us Jesus himself, the source of grace. Mary is a Mediatrix and Dispenser of Graces.” (Pius XII: Radio message to the Italian Catholic Action, December 8, 1953) — [p. 22, no. 59]

Under her Patronage
11. “Since Mary is ‘Mother of Mercy, our life, our sweetness and our hope,’ let us cry to her, ‘mourning and weeping in the vale of tears,’ and place ourselves and all that is ours confidently under her patronage.” (Pius XII: Mediator Dei, November 20, 1947.) — [p. 25, no. 71]

Hope & Trust
12. “The Catholic Church has always and with justice put all her hope and trust in the Mother of God.” (Leo XIII: Encyclical, Supreme Apostolatus, September 1, 1883.) — [p. 32, no. 104]

Suffering with her Son
13. “According to the common teaching of the Doctors, it was God’s design that the Blessed Virgin Mary, apparently absent from the public life of Jesus, should assist him when he was dying nailed to the Cross. Mary suffered and as it were, nearly died with her suffering Son; for the salvation of mankind she renounced her mother’s rights and, as far as it depended on her, offered her Son to placate divine justice; so we may well say that she with Christ redeemed mankind.” (Benedict XV: Letter, Inter sodalicia, May 22, 1918.) [p. 35; no. 119]

Immune from All Sin
14. “She it was who, immune from all sin, personal or inherited, and ever more closely united with her Son, offered him on Golgotha to the Eternal Father….” (Pius XII: Encyclical, Mystical corporis, June 29, 1943.) [p. 37; no. 128.]

 

Sorrowful Heart of Mary, pray for us.

Necessary to Secure Salvation
15. “… it is evident that she cannot do other than help most devotedly her dearest adopted sons at an hour at which it is necessary to secure for them salvation and sanctity for all eternity.” (Benedict XV: Letter, Inter sodalicia, May 22, 1918.) [p. 46; no. 171]

She Has Received Us As Sons
16. “… It was before the eyes of Mary that the divine sacrifice for which she had borne and nurtured the Victim was to be finished. … In the miracle of love, so that she might receive us as her sons ….” (Leo XIII: Encyclical, Jucunda semper, September 8, 1894.) [p. 50; no.187]

All Graces to Mankind
17. “Mary is all powerful with her divine Son who grants all graces to mankind through her …” (Benedict XV: Encyclical, Fausto appetente die, June 29, 1921.) [p. 59; no. 244]

Salvation of the Christian People
18. “From whom can we expect the salvation of the Christian people today if not from her of whom it is written that whosoever shall find her shall find life and shall have salvation from the Lord?” (Pius XI: Letter, Cum valde, Februrary 20, 1929.) [p. 59; no. 245]