A royal court, not a court of law
The Roman Curia is the administrative body through which the Catholic Church’s central affairs are conducted, assisting the Pope in exercising his authority over the worldwide church. Its creation is generally credited to Pope Urban II, who reigned from 1088 to 1099, though the institution’s name reflects an older sense of the word: in medieval and later Latin usage, curia meant royal court rather than court of law, and English-language sources have at times rendered the body as the Court of Rome, including in a 1534 Act of Parliament that barred appeals to it from England. This naming history signals that the Curia was conceived from the start as something closer to a royal household than a modern civil-service ministry.
Distinct from Vatican City
The Curia is not the same institution as Vatican City, a distinction the sources are careful to draw out. It serves the Holy See, the church’s central governing authority, which traces its own history to the apostolic see said to have been established by Saint Peter in the first century and which held territorial sovereignty over the Papal States from the eighth century until 1870. Vatican City itself is a much younger creation, a city-state established by the Lateran Treaty of 1929. The Holy See today maintains diplomatic relations with 180 states and holds recognised legal personality in international law despite not meeting the ordinary criteria for statehood, a status distinct from, though closely bound up with, the Curia’s day-to-day administrative work.
Pius X folds it into canon law
The Curia’s structure grew unevenly over centuries and included, into the modern era, hereditary offices whose functions had become largely symbolic once the Papal States were lost. Pope Pius X ordered a reorganisation intended to address this, and the resulting changes were incorporated into the 1917 Code of Canon Law, giving the Curia a more codified and consistent legal basis than it had previously possessed. This reform did not attempt to abolish the Curia’s traditional character so much as regularise it, replacing informal accumulations of titles and privileges with a defined set of offices whose functions and lines of authority could be set out in canon law rather than left to custom and precedent built up piecemeal since the medieval period.
Paul VI modernises, and internationalises
Further reorganisation followed under Pope Paul VI beginning in the 1960s, with stated goals of modernising the Curia’s internal procedures and internationalising a staff that had historically skewed heavily Italian. These changes were later reflected in the 1983 Code of Canon Law, which updated the church’s overall legal framework to match the administrative changes already underway. The Curia’s structure was then formally regulated by Pope John Paul II’s 1988 constitution Pastor bonus, issued that June, which governed the body’s organisation for more than three decades. This sequence of reforms, spanning Pius X, Paul VI, and John Paul II, shows an institution that has been repeatedly rebuilt rather than left static, even as its underlying purpose of serving papal governance remained constant.
Pastor bonus to Praedicate evangelium
Pope Francis replaced Pastor bonus with a new constitution, Praedicate evangelium, issued on 19 March 2022 and taking effect that June. The new framework reorganised the Curia’s departments into a set of dicasteries alongside the Secretariat of State and other bodies, all formally equal in juridical standing, and set fixed five-year terms for prefects, members, and senior officials, renewable at the discretion of Curial superiors. Article 15 of the constitution specifically opened membership of dicasteries to laypeople alongside cardinals, bishops, priests, and members of religious institutes, a change from a structure that had previously assumed clerical leadership as the norm for the Curia’s senior positions, even where lay staff had long done much of its day-to-day administrative work.
A first for the dicasteries
The practical effect of that change became visible in January 2025, when Pope Francis appointed Sister Simona Brambilla as prefect of the Dicastery for Institutes of Consecrated Life and for Societies of Apostolic Life, making her the first woman to lead a Curial dicastery. Whether this appointment marks a durable shift in how senior Curial roles are filled, or a single notable exception within a structure still dominated by clergy, is not something the available record settles either way; it is simply the first instance of a possibility the 2022 constitution created. What is clear is that the Curia, an institution with roots in the eleventh century, continues to be actively reshaped by successive popes rather than preserved unchanged.