- 教會：A group of Christian faithful united by a hierarchy according to the norm of law which the supreme authority of the Church expressly or tacitly recognizes as sui iuris is called in this Code a Church sui iuris.
- 禮儀：A rite is the liturgical, theological, spiritual and disciplinary patrimony, culture and circumstances of history of a distinct people, by which its own manner of living the faith is manifested in each Church sui iuris.
- Isidore of Seville (p. 17)
- CCEO, canon 27
- CCEO, canon 28 §1
- "The terms 'Roman Church' and 'Roman Catholic Church' date from at least the early Middle Ages, but the stress on these terms became prominent after the Protestant Reformation. The reason was to emphasize the distinctive quality of being not only a Christian, because baptized, but of being a Catholic, because in communion with the Pope " ([http://www.catholicreference.net/index.cfm?id=36128 John Hardon, Modern Catholic Dictionary).
- Pope Pius XII taught in Humani Generis that "the Mystical Body of Christ and the Roman Catholic Church are one and the same thing" (Encyclical Humani Generis, 27).] Pope Benedict XVI called the Church "the Roman Catholic Church" at a meeting in Warsaw on 25 May 2006 and in joint declarations that he signed with the Archbishop of Canterbury, Rowan Williams, on 23 November 2006 and with Patriarch Bartholomew I of Constantinople on 30 November 2006.