The Kyrie, or Kyrie Eleison. The text has an ABA form (Kyrie eleison, Christe eleison, Kyrie eleison), but not all musical settings of it use an ABA musical structure.
There are many parts of the Renaissance musical mass. The Kyrie is one part of five in the Renaissance musical mass.
1.1 Kyrie 2.2 Gloria 3.3 Credo 4.4 Sanctus 5.5 Agnus Dei
No.
The Sanctus is in the Preface of the Eucharistic Prayer and is part of the Ordinary of the Mass, i.e. it does not change. The Preface is part of the Proper of the Mass, i.e. it changes according to the Season of the Year.
The Kyrie Eleison is in Greek but not commonly used during Mass these days in favor of the English penitential rites.
Better know as the Lord have mercy (Kyrie), Creed (Credo), Holy, Holy, Holy (Sanctus), and the Lamb of God (Agnus Dei) are all parts of the Eucharist or Mass.
A greek prayer, Kyrie eleison (Κύριε ελέησον), meaning "LORD, have mercy," that is often sung in Mass.
Kyrie eleison, Christe eleison "Lord have mercy, Christ have mercy" are the only Greek words in the Latin mass.
"Kyrie" is greek. It's part of the expression "Kyrie Eleison" which means "Lord, have mercy". Thus, "Kyrie" means "Lord" as in "God". it also means mister in greek, E.g. Kyrie sas parakalo voithiste me! trans.: Mister, please help me
The mass ordinary is the set of texts of the Roman Right mass that are generally invariable.
Kyrie, Gloria, Credo, Sanctus, Agnus Dei