|A brief description of Luther's liturgical reforms, with a side by side comparison of the mass in Latin and German. And a couple of additional resources to follow.|
"In 1523 Martin Luther reformed the late medieval liturgy of the Mass. He called it Formula Missae or the Latin Mass. Luther used the purity of the Gospel (the doctrine of justification) as his main criteria for reforming the late medieval Latin Mass. Luther recognized the need for further reform of the church's liturgy, hinting at this already in the text of his Latin Mass.
In 1526 Luther further reformed the church's liturgy. He called it Deutsche Messe or the German Mass. Luther composed his German Mass to provide worship in the language of the people, primarily for those who were less educated and less experienced in theological matters.
What is probably the most surprising element of Luther's reforms of the late medieval liturgy of the Mass, is that he did not select a single form and hold it up as the ideal liturgy to be followed by all Christians. Luther actually wrote against this.
What Luther in fact did was to evaluate the needs of the Wittenburg community he served, and then provide God's people there with these two services. He did not hold up either service as more "authentic" than the other. Neither did he look down on those who displayed a need for the traditional forms they had grown accustomed to. Instead Luther ran these two very different services right alongside each other in the service of the Gospel in Christ's church.
Lutheran services from 1526 to the end of the sixteenth century and into the seventeenth century by and large followed one of these two outlines. This demonstrates a willingness on the part of pastors and lay people during this period to allow for a certain amount of freedom in the execution of the church's liturgy in different locations. It also demonstrates that they arrived at a formula that promoted harmony among God's people.
A side-by-side comparison of Luther's Latin Mass and Luther's German Mass is one example of the liturgical diversity Luther and his colleagues were willing to allow for in the church. This comparison does not fully illustrate the diversity in the execution of the forms that the sixteenth-century reformers appreciated (Latin chants, German chorales, hymnic settings for liturgical texts like the Creed and the Lord's Prayer, e.g.). But it shows in the simplest way how they appreciated the need for diversity in worship practices even within the same local context.
The Latin Mass . . . . . . . . . . . . . . . . . The German Mass Here Luther allowed for "various melodies for different seasons."
 Luther gave the option to the local pastor to "decide to omit [the Gloria in excelsis] as often as he wishes."
 Luther argued for the singing of the Alleluia during Lent, Holy Week, and on Good Friday. "For the Alleluia is the perpetual voice of the church, just as the memorial of His passion and victory is perpetual."
 A sequence refers to a medieval musical arrangement that follows "in sequence" in the liturgical order. The term sequence also referred to the harmonic sequence of the music. Luther made this element of the liturgical order a choice of the local pastor.
 The singing of the Creed for Luther was a matter that "should also be left in the hands of the bishop." Luther referred to the local pastor as "bishop."
 Here Luther argued that the sermon should come before the reception of the Lord's Supper; ". . . it might be argued that since the Gospel is the voice crying in the wilderness and calling unbelievers to faith, it seems particularly fitting to preach before mass." Luther referred to the administration of the Sacrament of the Altar as "the mass."
 During the singing of the Angus Dei, according to Luther, the presiding minister was to "communicate, first himself and then the people."
 Luther wrote, "I also wish we had as many songs as possible in the vernacular which the people could sing during mass, immediately after the gradual and also after the Sanctus and Agnus Dei. . . . But poets are wanting among us, or not yet known, who could compose evangelical and spiritual songs, as Paul calls them [Col. 3:16], worthy to be used in the church of God."
Via Luther's Liturgical Reforms
And here are two additional essays on Luther's reform of worship and the development of Lutheran liturgies.
Luther on the Reform of Worship, by Helmar Jungans
Lutheran Liturgies from Martin Luther to Wilhelm Löhe , by Vernon P. Kleinig