Missa Sancti Nicolai, Mass No. 6 in G major, Hob. XII/6, also known as the "Nicolaimesse", was made by Joseph Haydn, composed around 1772 and revised in 1802, is which form of sacred musical composition, is a choral composition that sets the invariable portions of the Eucharistic liturgy, to music?
Mass (music) The Mass (Latin: "Missa" ), a form of sacred musical composition, is a choral composition that sets the invariable portions of the Eucharistic liturgy (principally that of the Catholic Church, the Anglican Communion, and Lutheranism) to music. Most Masses are settings of the liturgy in Latin, the liturgical sacred language of the Catholic Church's Roman liturgy, but there are a significant number written in the languages of non-Catholic countries where vernacular worship has long been the norm. For example, there are many Masses (often called "Communion Services") written in English for the Church of England. Musical Masses take their name from the Catholic liturgy called "the Mass" as well.
Crab canon A crab canon (also known by the Latin form of the name, "canon cancrizans"; as well as "retrograde canon", "canon per recte et retro" or "canon per rectus et inversus") is an arrangement of two musical lines that are complementary and backward, similar to a palindrome. Originally it is a musical term for a kind of canon in which one line is reversed in time from the other (e.g. FABACEAE played simultaneously with EAECABAF). A famous example is found in J. S. Bach's "The Musical Offering", which also contains a canon ("Quaerendo invenietis") combining retrogression with inversion, i.e., the music is turned upside down by one player, which is a table canon.