Feria in the Octave of St Laurence; Com.  Vigil of the Dormition [/Assumption] & Com. Feast of St Eusebius: Missa “Conféssio et pulchritúdo“ As early as the Seventh Century the preparation, by a solemn fast, for keeping devoutly the great festival of the Dormition of the Mother of God (aka The Assumption), is described as a custom of great antiquity….