Another change (and not a minor one): Leo XIV completely replaces Pope Francis’s Vatican law
Pope Leo XIV promulgated a new Fundamental Law on July 31, 2026, replacing Pope Francis’s 2023 constitution. The new law entered into force immediately, bypassing the customary period between promulgation and implementation. It is the fourth constitutional text for Vatican City State, following the 1929, 2000, and 2023 laws.
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Pope Leo XIV has issued a new Fundamental Law for Vatican City, replacing Pope Francis’s 2023 constitution only three years after its promulgation. While the overall governmental structure remains intact, the revision makes precise textual corrections, most notably removing the reference that the Pope’s temporal authority derives “by virtue of the Petrine office” and clarifying the legal basis for Vatican governance and its institutions. 1
The new Fundamental Law was promulgated on 31 July 2026 and entered into force immediately, bypassing the usual waiting period. It is the fourth constitutional text of the modern Vatican state, following those of Pius XI (1929), John Paul II (2000) and Francis (2023). 1
Francis’s 2023 law linked the Pope’s sovereignty over Vatican City to his role as the successor of Saint Peter. Leo XIV’s revision eliminates this wording, separating the Pope’s spiritual authority—rooted in the Petrine succession—from the temporal sovereignty of the city‑state, which originates from the 1929 Lateran Treaty. 1
The temporal power of the papacy began with the medieval Papal States, not with Saint Peter. The Lateran Pacts created Vatican City to guarantee the Holy See’s independence for its international mission. By removing the Petrine reference, the new law restores this historically accurate rationale and avoids implying a theocratic identity. 1
One concrete outcome is the permanent legalization of Sister Raffaella Petrini’s role as President of the Pontifical Commission and Governorate, despite her not being a cardinal. The amendment now allows the presidency to be held by a cardinal, religious, woman religious, or layperson, detaching the position from sacramental status. 1
These changes aim to eliminate ambiguities between legal text and administrative practice. 1
Leo XIV’s reform does not overhaul the Vatican’s institutional architecture but refines its constitutional language to align with historical facts and recent governance realities. The revision is both conservative—preserving the five‑part structure—and corrective—ensuring the legal description matches the state’s actual functioning. 1*
Examine Catholic constitutional law’s evolution and its doctrinal implications
Catholic constitutional law has evolved from a medieval theory of a unified Christian political order, through the limitation of papal temporal power, to the modern juridical structure of the Holy See and Vatican City State. Its central doctrinal continuity is the distinction—though historically contested—between the Church’s divine spiritual mission and the contingent legal-political arrangements adopted to protect and exercise that mission.
“Catholic constitutional law” may be understood in two related senses:
These two senses should not be collapsed. The medieval claim that the pope possessed authority concerning Christian rulers was not identical to the modern constitutional structure of Vatican City. Likewise, Vatican sovereignty is not itself the essence of the Church’s divine constitution.
In the medieval West, political and ecclesial institutions operated within a shared Christian civilization. Bishops and popes exercised not only spiritual authority but, in some places, jurisdiction over temporal matters. The historical record included ecclesiastical jurisdiction concerning testamentary dispositions, charitable legacies, education, legitimacy, and other “mixed causes”—matters possessing both civil and religious dimensions.
The resulting system was not a modern separation of church and state. It was instead a jurisdictional pluralism, in which different authorities claimed competence over overlapping aspects of social life. The Catholic Encyclopedia describes this as a “double jurisdiction” that generated repeated conflict between Church and State.
This medieval arrangement had two important constitutional implications:
The principle behind this arrangement was not necessarily that clerics should administer every civil matter. Rather, the Church claimed that no temporal order could be completely indifferent to the spiritual and moral destiny of persons.
The medieval tradition did not speak with one simple voice concerning the pope’s temporal power. The principal controversy concerned whether papal authority over temporal affairs was direct or indirect.
According to the theory of potestas directa, the pope possessed supreme authority over both spiritual and temporal affairs because Christ, the King of kings, had entrusted the fullness of power to His vicars. Kings and emperors would therefore govern as subordinate authorities accountable to the pope.
This view could draw support from certain formulations in medieval papal documents, including statements associated with Gregory VII and Innocent III. Yet even the historical account supplied here cautions that such texts must be interpreted in their wider context. Innocent III’s assertion that the whole world was entrusted to Peter may have been intended primarily to affirm the universality of papal spiritual jurisdiction rather than a claim to administer every civil government directly.
The theory of potestas indirecta, associated especially with later Catholic theologians such as Robert Bellarmine, distinguished the Church’s spiritual authority from ordinary civil government. The pope did not ordinarily govern temporal affairs directly; nevertheless, he could intervene indirectly when civil matters affected faith, morals, the salvation of souls, or the Church’s freedom.
This distinction represented a major conceptual development. It preserved the Church’s claim to ultimate moral and spiritual authority without requiring the pope to function as the ordinary civil ruler of Christian kingdoms. Hankey’s study notes that Bellarmine’s approach limited papal authority in comparison with stronger forms of “Political Augustinianism,” under which secular authority was expected to act “at the nod” of priestly authority.
The doctrinal importance of this distinction is considerable. It implies that:
The theory of indirect power therefore helped Catholic thought move from a medieval model of sacral political unity toward a more differentiated account of Church and State.
The historical development of Catholic constitutional law cannot be separated from the temporal territories governed by the popes. Bellarmine defended the legitimacy of the pope’s territorial possessions by appealing to donations from Christian rulers, long-standing possession, and prescription—the legal principle by which prolonged possession can mature into a legitimate title.
This argument reflects the legal categories of the early modern period. It did not necessarily mean that territorial sovereignty was intrinsic to the papacy. Rather, it treated the Papal States as legitimate temporal possessions acquired and maintained through recognizable juridical means.
The distinction between the pope’s two roles becomes especially clear in the analysis of Gregory Journet. During the period of the Papal States, popes could act:
The second role was described as nonessential to the Church’s nature, although historically necessary under particular conditions. The Papal States existed for centuries but disappeared in 1870.
This historical separation between the essential spiritual office of the pope and the contingent temporal office of a territorial prince is a key doctrinal implication. It prevents the identification of Catholicism with any particular political regime or territorial arrangement.
The Lateran settlement of 1929 created Vatican City State. The constitutional documentation states that the Vatican City State was established by treaty and that the pope held full sovereignty within it. It also distinguished the civil administration of Vatican City from the religious administration of the wider Diocese of Rome.
This settlement marked a decisive transformation. The papacy no longer exercised extensive territorial rule over central Italy, but it retained a small sovereign territory designed to safeguard its independence. A later account of the Lateran settlement explains that Vatican City was intended to provide the Church and the pope with the independence necessary to fulfill the mandate received from Christ without subordination to another human power.
The constitutional logic is therefore instrumental rather than imperial:
Vatican sovereignty exists as a juridical guarantee of the Holy See’s freedom, not as the substance of the Church’s spiritual authority.
This distinction also explains why the Vatican’s territorial size is constitutionally unimportant. What matters is not the extent of the territory but whether the Holy See can exercise its universal spiritual and diplomatic mission independently.
The 1929 framework established several foundational elements of Vatican constitutional law. The Acta Apostolicae Sedis records legislation concerning:
The early legal order also adopted a supplementary principle: where Vatican legislation did not provide an applicable rule, certain Italian laws and regulations could be used, provided that they were not contrary to divine law, the general principles of canon law, or the Lateran Treaty and Concordat.
This is constitutionally significant because it shows that Vatican law was not conceived as a completely isolated system. It was a limited sovereign legal order capable of borrowing or receiving norms from another legal system, subject to higher constraints arising from:
The arrangement reflects a layered legal order rather than strict legal autarky.
The modern constitutional order must also distinguish between the Holy See, the Roman Pontiff, the Roman Curia, and Vatican City State.
The Church’s universal constitution is ecclesial and sacramental. The pope is described in Praedicate Evangelium as the successor of Peter and the perpetual, visible source and foundation of unity for the bishops and the faithful. Individual bishops likewise serve as visible sources of unity in their particular Churches.
This means that the Church is not constituted merely as a territorial State. Dioceses and the universal Church are related through communion, apostolic succession, and episcopal unity. The Roman Pontiff’s authority is consequently not reducible to the powers of a head of state.
The same ecclesiological principle appears in In Ecclesiarum Communione, which presents the Bishop of Rome’s primary responsibility as safeguarding the faith and charity of the Church entrusted to him, in communion with the other bishops.
The doctrinal consequence is that Catholic constitutional law must be read on two levels:
The latter can be reformed without altering the Church’s divine constitution.
Recent Vatican legislation illustrates a continuing movement toward institutional specialization, administrative regularity, and legal accountability.
For example, a 2026 chirograph reorganized responsibility for World Children’s Day by dissolving a pontifical committee and transferring its functions to the Dicastery for the Laity, Family and Life. The measure repealed the committee’s founding instruments and assigned the dicastery competence over its former responsibilities.
Similarly, the Holy See’s financial constitutional order has developed through increasingly detailed systems of supervision, transparency, legality, proportionality, and cooperation with international authorities. The revised statute of the Supervisory and Financial Information Authority was presented as part of this continuing institutional development.
These reforms suggest that papal sovereignty is not equivalent to arbitrary administration. Although the pope possesses supreme authority within the Church and Vatican legal order, that authority is increasingly exercised through stable institutions, promulgated statutes, defined competences, and administrative procedures.
The same pattern appears in the judicial sphere. The 2024 reform of Vatican judicial law regulated the tenure, retirement, continuation, replacement, and civil responsibility of judicial officials. Such rules indicate a constitutional concern for judicial continuity and procedural reliability, even within a system ultimately subject to papal legislative authority.
The evolution from the Papal States to Vatican City demonstrates that territorial sovereignty is not essential to the Church. The Church existed before the Papal States and continues as a universal communion whose identity does not depend on civil territory.
Vatican City is instead a juridical instrument serving the freedom of the Holy See. Its purpose is functional: to protect the pope from domination by another temporal power and to enable the Church’s universal mission.
The medieval theories of direct and indirect power differ substantially, but both assume that political life is subject to moral and divine law. The later distinction between spiritual authority and ordinary civil governance does not imply moral relativism or the exclusion of religion from public life.
Rather, the Church’s authority is primarily ordered to faith, morals, worship, and salvation. Temporal intervention requires a connection between civil affairs and that spiritual mission. This is the principal doctrinal value of the potestas indirecta distinction.
The loss of the Papal States in 1870, the establishment of Vatican City in 1929, and subsequent reforms of Vatican institutions demonstrate the historical flexibility of Catholic constitutional arrangements. The Church may alter its administrative and territorial structures while preserving its essential constitution.
The 2026 establishment of the “Fratello Sole” Foundation likewise shows how Vatican institutions can be created to pursue practical objectives—energy sustainability, agricultural cooperation, and care for creation—within the sovereign legal framework of Vatican City.
The pope’s authority remains personal in the sense that the Roman Pontiff can promulgate laws and establish or suppress institutions by apostolic acts. The 2026 chirograph concerning World Children’s Day, for example, expressly gave immediate and stable force to the reorganization it enacted.
At the same time, contemporary practice increasingly expresses this authority through institutions and norms. The authority of the pope is therefore not negated by constitutional development; it is given more defined administrative forms.
The pope’s authority also has a fundamentally ecclesial purpose: preserving unity in faith, charity, and communion. Praedicate Evangelium identifies the Roman Pontiff as the visible foundation of unity among bishops and faithful.
This explains why papal authority cannot be analyzed solely by analogy with secular constitutional monarchies. Its ultimate justification is not dynastic succession, popular sovereignty, or territorial command, but the Petrine office within the Church’s apostolic structure.
The 2026 appeal by Pope Leo XIV to the Priestly Fraternity of Saint Pius X similarly presents papal authority as ordered to ecclesial communion and the lawful celebration of the sacraments.
Catholic constitutional law has moved through three broad phases: medieval jurisdictional pluralism, early modern clarification of papal temporal authority, and the modern sovereign-but-limited constitutional order of the Holy See and Vatican City State.
Its doctrinal implications are equally important. The Church recognizes the moral significance of political authority but does not identify her divine constitution with any particular State. Papal territorial power is historically contingent; papal spiritual primacy is constitutive of the Church. Vatican sovereignty exists to secure ecclesial freedom, while modern reforms increasingly express that sovereignty through specialized institutions, judicial norms, financial accountability, and administrative law.
The enduring Catholic principle is therefore not the fusion of Church and State, nor their absolute separation, but the ordered distinction of spiritual and temporal authority under the supremacy of divine and moral law.