Musicae Sacrae Disciplina

"Musicae Sacrae Disciplina" is a scholarly document issued by the Vatican in 1955 that provides guidelines for composing and performing church music in the Catholic tradition. It emphasizes the importance of respecting traditional liturgical music, promoting clear and understandable singing, and fostering reverence during worship. The document encourages the use of Gregorian chant and classical polyphony, aiming to enhance spiritual experience and unity in worship services, while modern styles are to be used cautiously and with regard to their harmony with the sacred setting.