Short answers, pulled from the story.
The English noun Mass is derived from the Middle Latin word missa, which traces back to the concluding formula of the Roman Rite, Ite missa est, meaning Go; the dismissal is made. The Latin term missa was already in use by the 6th century, appearing in the writings of Caesarius of Arles, who instructed monks to hold six masses every Sunday.
The Mass is composed of two main parts: the Liturgy of the Word and the Liturgy of the Eucharist. The Liturgy of the Word includes three Scripture readings on Sundays and solemnities, with the Gospel proclaimed as the high point of this section, followed by a homily and the profession of the Nicene Creed.
Martin Luther composed a revised Latin-language rite, Formula Missae, in 1523, and the vernacular Deutsche Messe in 1526. The Book of Concord, Article XXIV of the Augsburg Confession of 1530 states that the Mass is retained among Lutherans and celebrated with the highest reverence.
The various Eucharistic liturgies used by national churches of the Anglican Communion have continuously evolved from the 1549 and 1552 editions of the Book of Common Prayer, both of which owed their form and contents chiefly to the work of Thomas Cranmer. The 1552 revision made clear the restructuring of the elements of the rite while retaining nearly all the language.
The Divine Liturgy of St. Gregory is derived from the Tridentine form of the Roman Rite Mass and includes the Preparation for Mass, Confiteor, Kyrie Eleison, Gloria in excelsis deo, Collect of the Day, Epistle, Gradual, Alleluia, Gospel, Sermon, Nicene-Constantinopolitan Creed, Offertory, Dialogue, Preface, Sanctus, Canon, Lord's Prayer, Fraction, Agnus Dei, Prayers before Communion, Holy Communion, Prayer of Thanksgiving, Dismissal, Blessing of the Faithful, and Last Gospel.