Vatican Pius XII Archives Ongoing Release

What this countdown tracks

The Archivio Apostolico Vaticano continues its staged release of the Pontificate of Pius XII papers through 2026, with the next major tranche of inventories expected on 1 October 2026. Scholars working on the 1939–1958 papacy gain additional finding aids and declassified files covering the Second World War, the Holocaust, and post-war Church diplomacy.

Background

Pope Francis opened the Pius XII archives to researchers on 2 March 2020, reversing the 75-year embargo and bringing forward a collection that had been anticipated for decades. The opening covered materials in the Archivio Apostolico Vaticano (formerly the Secret Archive, renamed on 22 October 2019), as well as Congregations, the Secretariat of State, and diocesan holdings linked to Rome. Access was interrupted by the COVID-19 pandemic but resumed in mid-2020.

Since the initial opening, the Vatican has published new inventories in rolling tranches because of the sheer volume — an estimated 16 million pages — and the fragile condition of parts of the collection. The Commission on the Historical Sciences has overseen publication of selected registers; historians including David Kertzer, Hubert Wolf, and Suzanne Brown-Fleming have published monographs drawing on the material. Pope Leo XIV, elected on 8 May 2025 following the death of Pope Francis on 21 April 2025, has publicly reiterated his support for continued scholarly access. The Jewish Series (Serie Ebrei) of the Secretariat of State, catalogued under Prefect Archbishop Sergio Pagano, accounts for roughly 170 volumes. A parallel digitisation programme, supported by the US Holocaust Memorial Museum and Yad Vashem through cooperation agreements signed in 2022 and 2023, has placed selected series online.

October 2026 marks the traditional anniversary window of Pius XII's 2 October 1958 death announcement, when the Vatican has previously released themed inventories and microfilmed collections.

Why the date matters

1 October 2026 aligns with the Vatican's published archival-release calendar and historical-commission workflow, coinciding with the 68th anniversary of Pius XII's death on 9 October 1958. Academic cycles at pontifical universities also resume in October, so releases on this date maximise scholar access. The 2026 tranche is expected to include additional wartime Secretariat-of-State registers and correspondence with Roman Jewish community leaders. Comparable Vatican archive openings — the 2002 release of Holy Office records on the interwar period and the 2006 opening of Pius XI papers — were similarly timed to the autumn scholarly calendar, a pattern that aids travel planning by the roughly 200 accredited researchers the reading rooms admit in any given week.

What to watch for

• Inventory publications in the Archivio Apostolico bulletin
• New access rules for non-Catholic and Jewish-community scholars
• Coverage of wartime correspondence with German bishops
• Release of Holy Office files related to racial-law policies
• Digitisation progress and online catalogue additions
• Commission on Historical Sciences statements
• Pope Leo XIV remarks framing the release
• Cooperation updates with the US Holocaust Memorial Museum and Yad Vashem
• Publication of new monographs drawing on the tranche

Historical context

The Vatican's archival policy has moved progressively toward earlier disclosure across the last half-century. Pope Paul VI authorised access to files up to 1903 in 1978; John Paul II extended the window to 1922 in 1981 and later to 1939; Benedict XVI opened the Pius XI pontificate (1922–1939) in 2006; Francis advanced to Pius XII in 2020. Each opening has attracted controversy over the record of papal responses to anti-Semitism, fascist regimes and the Holocaust. The 2020 opening prompted immediate publication of David Kertzer's "The Pope at War" (2022) and Hubert Wolf's ongoing "Pius XII: The Pope and the Shoah" project at the University of Münster, both of which shaped current historiographical debate. The Pontifical Committee for Historical Sciences, founded by Pius XII in 1954, continues to coordinate scholarly access.

Related events to track

This release intersects with the Synod of Synodality Final Reports published a fortnight later. For scholarly archive comparators see the UK TNA Cabinet Papers Release 2027 and UK TNA Cabinet Papers Release 2028.

FAQ

When exactly are the archives released? A scheduled tranche of inventories and registers is expected around 1 October 2026; access is continuous but new finding aids appear in batches announced by Prefect Sergio Pagano.

Is the release confirmed or expected? Expected. The Archivio Apostolico Vaticano publishes schedules quarterly and has not issued a final 2026 calendar, though the October window is consistent with past practice.

Who is responsible for the release? The Archivio Apostolico Vaticano, working with the Pontifical Committee for Historical Sciences, under the authority of the Secretariat of State.

Where can I read the official announcement? Vatican.va and the Archivio's own bulletin publish each release; updates also appear in L'Osservatore Romano and the Acta Apostolicae Sedis.