the Byzantine Rite, the contents of the ritual are contained in the Euchologion. The Armenians have a ritual book (Mashdotz) similar to the Roman Ritual. Other churches not in communion with the Holy See have not yet arranged the various parts of this book in one collection. Nearly all the Eastern Catholic Churches, however, now have ritual books formed on the Roman model. See also Breviary Pontifical Missal Vade retro satana References External links 1964 Roman Ritual for use in the United States Usuarium, A Digital Library and Database for the Study of Latin Liturgical History in the Middle Ages and Early Modern Period Further reading Roman Rite liturgical books Christian processions