Joseph Gelineau (1920-2018) was a French composer and liturgist known for his significant contributions to contemporary liturgical music. He is best recognized for his work in the genre of sacred music, particularly within the Catholic Church. Gelineau's innovative approach to liturgy emphasized the importance of congregational participation and the incorporation of modern musical styles into worship. One of his most notable works includes the "Chansons de la liturgie," a collection of songs designed for Mass, which reflects his commitment to making liturgical music accessible and engaging for congregations. He also developed the "Gelineau psalmody," a method of chanting psalms that blends traditional Gregorian chant with contemporary melodic structures. Gelineau's impact extends beyond his compositions; he was a key figure in the liturgical renewal movements of the 20th century, particularly following the Second Vatican Council, which encouraged the use of vernacular languages in the liturgy. His work has influenced a generation of liturgical composers and continues to resonate within Catholic worship settings, promoting a more dynamic and participatory experience in the liturgy.