While the sacred vessels are being purified, the assembly may observe a brief period of silent prayer or a hymn of praise may be sung. Silence may be more important than song, especially when there has already been a good deal of singing during the Mass.
The Prayer after Communion
Standing at his chair or at the altar, the celebrant offers the post communion prayer. This prayer asks that the mystery that has been celebrated may bear fruit.
The Concluding Rites
Following the post communion prayer, brief announcements may be made. These should be short and of concern to everyone. Extended announcements should be available in the church bulletin.
The Final Blessing & Dismissal
Before the middle ages, the priest blessed the people as he made his way out of the church. At the end of the middle ages, it was placed before the dismissal. After the greeting, “The Lord be with you…” All blessings are trinitarian… “May Almighty God, bless you, the Father, the Son…” This may be preceded by a “Prayer over the People.” On certain days, a solemn blessing may be imparted. It is preceded by three invocations over the people to each the people respond “Amen”
After the blessing, the deacon (or celebrant) dismisses the assembly and all respond “Thanks be to God.” The celebrant and deacon venerate the altar with a kiss and exit. This may be done in silence or accompanied by a hymn or instrumental music.