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An apostolic constitution (Latin constitutio apostolica) is the highest level of decree issued by the Pope of the Roman Catholic Church. The use of the term constitution comes from Latin constitutio, which referred to any important law issued by the Roman emperor, and is retained in church documents because of the inheritance that the canon law of the Roman Catholic Church received from Roman law.

By their nature, apostolic constitutions are addressed to the public. Generic constitutions use the title Apostolic Constitution, and treat on solemn matters of the church, such as the promulgation of statutes or definitive teachings. The forms Dogmatic Constitution and Pastoral Constitution are titles sometimes used to be more descriptive as to the document's purpose.

Apostolic Constitutions are issued as Papal bulls due to their solemn, public form. The next highest category, after an Apostolic Constitution, is an Encyclical Letter.

• Universi Dominici gregis (1996) — John Paul II's rules on electing the Roman pontiff
• Fidei depositum (1992) John Paul II's Apostolic constitution on the new Catechism of the Catholic Church
• Ex corde ecclesiae (1990) — John Paul II's rules on Catholic universities
• Pastor Bonus (1988) — John Paul II's rules on the organization of the Roman Curia
• Sacrae Disciplinae Leges (1983) John Paul's constitution instituting the 1983 Code of Canon Law
• Ut sit (1982) John Paul II's Apostolic constitution raising Opus Dei to the rank of a personal prelature
• Romano Pontifici eligendo (1975) Paul VI's Apostolic constitution on the election of the Roman pontiff
• Missale Romanum (1969) Paul VI's Apostolic constitution on the revised liturgy
• Paenitemini (1966) Paul VI's Apostolic constitution on Fasting and Abstinence in the Roman Catholic Church.
• Veterum sapientia (1962) John XXIII's Apostolic constitution on the promotion of the study of Latin
• Munificentissimus Deus (1950) Pius XII's dogmatic constitution on the Assumption of Mary.
• Ineffabilis Deus (1854) Pius IX's dogmatic constitution on the Immaculate Conception of Mary.
• Quo primum (1570) Pius V's Apostolic constitution on the Tridentine Mass

• Huels, John M. "A theory of juridical documents based on canons 29-34", Studia Canonica, 1998, vol. 32, no. 2, pp. 337-370.