Can Concordi Laetitia be sung as the bride’s entry hymn (is that the proper term?) at the celebration of the sacrament of Holy Matrimony according to the usus antiquior?
There is nothing prescribed (in fact, the Rituale and the American Collectio Rituum say nothing about a bride processing in), so really you could have any piece that is in keeping with the sacred nature of the ceremony, or nothing at all.
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