The sequentia, originated from the trope of the alleluia-melisma, was normally used during the mass in the early Middle Ages. It praised a liturgical event or the life of a celebrated saint until Pope Pius V, with a few exceptions, forbade this usage.

To this day only 4 sequentias are still sung: 'Stabat Mater', 'Lauda Sion', 'Victimae paschali laudes' and 'Veni Sancte Spiritus'.

By coincidence an old manuscript was found at 'de Zwarte Zusters' (the Black Sisters) in Bruges. It was the sequentia 'Dies nobis reparatur'. It praised in 20 verses the life-story of Saint Donatius, patron saint of the cathedral, the diocese and of Bruges. The music seems to be inspired by an older manuscript of the XIIIth century. Moreover the sequentia is probably an imitation of the sequentia of the feast of the Circumcision, 'In excelcis canitur', by Adam, abbot of Saint Victor in Paris, considered as the greatest liturgical poet of the Middle Ages by Dom Guéranger.

During a broad-cast of VRT 3 on July 24, 1998 the Scola gave a first performance of it and sang it also on November 10, 1998 for the occasion of the exposition of the Saint Donatius Church in Bruges.

The mystery play 'The three Maria's', a manuscript from the XIIth century, was originally performed in the cathedral of Vic in Catalonia, not far from the Spanish Pyrenees.

The drama of the three Maria's, who came to visit the grave of the Lord and wanted to balm His body, is sung and depicted. Also two angels and a gardener (Christ himself) appear in this play.
For the first time, and this 100 years earlier than anywhere in Christianity, a non-biblical figure appears: a merchant, a person seized out of daily life. The three Maria's deal with him and Maria Magdalena has to pay a golden coin for the balm

On March 25, 2000 the whole choir of the Scola attended by several of its own soloists brought this mystery play during 'The Festival de Arte Sacro' in Madrid.