Григорианские католические песнопения - католическая хоровая музыка - текст песни, слова, перевод, видео

(The standard of Catholic choral music from 1653, was performed only in Rome, in the Cathedral of St. Peter. The manuscript was strictly guarded. But in 1770, the young Mozart, visiting the cathedral, just remembered this mass on his ear and reproduced it. The scandal was incredible