For example, in the Roman Catholic tradition the hugely influential Constitution on the Sacred Liturgy which emerged from the Second Vatican Council in 1963 (the same year that the Faith and Order Conference was held in Montreal) defines liturgy as a ‘an exercise of the priestly office of Jesus Christ’, in which ‘public worship is performed by the Mystical Body of Jesus Christ, that is, by the Head and his members’ (Sacrosanctum Concilium, 1996, §7). Significantly for ecumenical dialogue and for liturgical renewal and revision, the presence of Christ in the liturgy of the Church was to be identified not just in the eucharistic elements but in other dimensions of the liturgical celebration: ‘He is present in his word since it is he who speaks when the holy scriptures are read . . . he is present when the Church prays and sings’ (Sacrosanctum Concilium, 1996, §7).