Sacrosanctum Concilium, also known as the Constitution on the Sacred Liturgy, is a document from the Second Vatican Council of the Catholic Church. It was promulgated by Pope Paul VI in 1963 and aimed to reform the liturgy of the Catholic Church. The document discusses the importance of liturgy in the life of the Church, emphasizes the need for active participation by the faithful, and outlines principles for liturgical reform. It also provides specific directions for the celebration of the Eucharist, other sacraments, the Divine Office, the liturgical year, sacred music, sacred art, and sacred furnishings. The document calls for a more active and conscious participation of the faithful in the liturgy, the use of vernacular languages where appropriate, and a greater emphasis on the scriptures.