Prayers After MassÂ
(Prayers after the Holy Sacrifice of the Mass were first promulgated by Pope Leo XIII & Pope Pius X).
Moved by the inspiration of the Holy Spirit, hearing and heeding the voice of conscience, and in accord with the Sensus Fidelium, if no priest is present who will lead the prayers, one (or multiple members) of  the faithful may recite the prayers in the church after any Mass, reverently and vocally.  Where two are three recite the prayers, Jesus is there with them.
The prayers may be said in either Latin or in the vernacular.
From Inter Oecumenici,  Instruction on Implementing Liturgical Norms, Sep 26, 1964: “35. In addition, pastors shall not neglect to ensure prudently and charitably that in the liturgical services and more especially in the celebration of Mass and the administration of the sacraments and sacramentals the equality of the faithful is clearly apparent . . ..
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Priest: Hail Mary, full of grace, the Lord is with thee; blessed art thou amongst women, and blessed is the fruit of thy womb, Jesus.
All: Holy Mary, Mother of God, pray for us sinners, now and at the hour of our death. Amen. [3 times]
All: Hail, Holy Queen, Mother of Mercy, our life, our sweetness, and our hope. To thee to we cry, poor banished children of Eve. To thee do we send up our sighs, mourning and weeping in this valley of tears. Turn then, most gracious advocate, thine eyes of mercy toward us, and after this exile, show unto us the blessed Fruit of thy womb, Jesus. O clement, O loving, O sweet Virgin Mary.
Priest: Pray for us, O holy Mother of God.
All: That we may be made worthy of the promises of Christ.
Priest: Let us pray. O God, our refuge and our strength, look down with mercy upon the people who cry to Thee; and by the intercession of the glorious and immaculate Virgin Mary, Mother of God, of Saint Joseph her spouse, of the blessed Apostles Peter and Paul, and of all the saints, in Thy mercy and goodness hear our prayers for the conversion of sinners, and for the liberty and exaltation of the Holy Mother the Church. Through the same Christ Our Lord.
All: Amen.
All: Saint Michael the Archangel, defend us in battle; be our protection against the wickedness and snares of the devil. May God rebuke him, we humbly pray: and do thou, O Prince of the heavenly host, by the power of God, thrust into hell Satan and all the evil spirits who prowl about the world seeking the ruin of souls. Amen.
Priest: Most Sacred Heart of Jesus
All: Have mercy on us. [3 times]
Lex Orandi, Lex Credendi, Lex Vivendi.
My Fatima-directed Rosary [I say every evening] booklet [my grandmother gave it to me many years ago] has in the prayer before the Rosary: obtain . . . the conversion of sinners, of Russia, and [I add] of America . . .
The list of individual and institutional sinners needing conversion is way too long.
T. Shaw: my petition to Our Lady is always:
For , the Poor Souls, and myself,
My family, and the family of ,
Your priests, and the whole world …
Oops:
For my child, the Poor Souls and myself,
My family and the family of my parish,
Your priests and the whole world.
Bracketed items are dropped in submission, I guess
Thank you, Guy, for this post.