A list of priestly societies and religious institutes using a pre-1970 version of the Roman Missal some but not all are in communion with the Holy See. These groups are dedicated to preserving older liturgical rites of the Roman Catholic Mass. These groups are sometimes called Ecclesia Dei Communities, as they have been approved by or are seeking approval from the Pontifical Commission Ecclesia Dei. Most of the following following groups use the pre-1970 Roman Missal, but some follow the proper Missal of the Dominican Rite or the Carmelite Rite.