The sound of heaven?? Tourists amazed hearing Gregorian chant in Parma Cathedral

Vidi Aquam chant in Parma cathedral baptistery
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English Translation:
I saw water flowing from the Temple, from its right-hand side, alleluia;
and all to whom this water came were saved and shall say: Alleluia, alleluia.
Ps. Give thanks to the Lord, for He is good, for His mercy endures forever. Glory be to the Father, and to the Son, and to the Holy Spirit:
as it was in the beginning, is now, and ever shall be, world without end.
Amen.