When did the Kyrie first appear in the mass liturgy?
The Kyrie probably appeared first around the 7th century. It was one of the earliest unchanging portions to enter the mass before other sections joined later.
Short answers, pulled from the story.
The Kyrie probably appeared first around the 7th century. It was one of the earliest unchanging portions to enter the mass before other sections joined later.
The Ivrea Codex and the Apt Codex serve as the two manuscripts from the 14th century that act as primary sources for these polyphonic settings. Most of this music was written or assembled at the papal court at Avignon.
Guillaume de Machaut composed the Messe de Nostre Dame which stands as the most famous example of an early complete setting. Individual movements and pairs like Gloria and Credo became common during the 14th and early 15th centuries.
Pope Pius X issued his motu proprio Tra le sollecitudini on the 28th of July 1903 which forbade all percussive instruments and explicitly banned the piano from use in church settings. These rules also ended the practice of alternatim between choir and organ and prohibited women from being present in the choir.
A new translation of the Roman Missal was published in 2011 prompting expectations for immediate use of new settings. Bishops in England and Wales permitted older settings to continue until Pentecost Sunday 2014.