This musical score provides a contemporary choral setting of the liturgical text 'O Ecclesia' for a mixed SATB ensemble. The work is composed by Matthew Brown, who utilizes traditional choral structures to explore the harmonic possibilities of a cappella performance. The score serves as a functional resource for vocal ensembles seeking to perform modern liturgical or concert repertoire.

The composition is regarded as a technical resource for choral directors and vocal ensembles focusing on contemporary sacred music. The score provides a clear, accessible framework for performance while maintaining the traditional requirements of a cappella SATB arrangements.