or Divine Office, contained in a liturgical book called theBreviarium Romanum, or Roman Breviary. In fact, the Mass is part of the Divine Office, and they are so intertwined in the public liturgy of the Church that one is really incomplete without the...
The Divinum Officium Project: Traditional Roman Missal and Breviary Texts - DivinumOfficium/divinum-officium
In the Traditional Liturgy, the lectionary was tailored to match the breviary and lead the faithful to a certain idea through its collects, antiphons and other propers; the lectionary of the Novus Ordo often makes use of antiphons and propers that do not match any liturgical objective, prayers...