Archbishop Paul Gallagher, the Vatican’s Secretary for Relations with States — its top diplomatic official — traveled to Moscow this week for a series of high-level meetings, urging Russia to pursue a negotiated end to the war in Ukraine. His visit placed the Holy See directly in the corridors of Russian foreign policy at a moment when conventional diplomatic channels between Moscow and Western nations remain largely frozen.

On Tuesday, Gallagher appeared alongside Russian Foreign Minister Sergey Lavrov, delivering a message consistent with the Vatican’s longstanding position: military force cannot settle the conflict. “The conflict cannot be resolved by military means,” Gallagher told the Crux, according to reports of the meeting. “This war must end.”

A Diplomatic Channel Other Governments Cannot Open

The Vatican’s ability to engage Moscow directly — when most Western foreign ministers cannot — reflects the unique standing of the Holy See in international affairs. As a non-aligned sovereign entity with diplomatic relations across the globe, the Vatican has repeatedly sought to position itself as a credible interlocutor acceptable to all parties. Its offer to host direct talks between Ukraine and Russia remains on the table.

Gallagher called on both warring parties to observe international and humanitarian law across a range of specific concerns: the protection of civilian infrastructure, the treatment of prisoners of war, and the care of wounded combatants. His appeal was framed not as a partisan intervention but as an insistence on norms that bind every belligerent regardless of which side holds the moral high ground in any given assessment of the war’s origins.

Lavrov, for his part, described the meeting with Gallagher as “very useful” and expressed agreement that cooperation between Russia and the Holy See should be deepened, particularly in humanitarian matters. The Russian foreign minister had separately rejected, just days earlier on Saturday, any prospect of negotiations with Western countries — a posture that makes the Vatican’s independent channel all the more notable, even if its practical leverage remains limited.

Pope Leo XIV’s Repeated Appeals

Gallagher’s Moscow visit carries the explicit weight of papal mandate. Earlier this month, Pope Leo XIV renewed his appeal for an end to the fighting, calling on all belligerents to halt attacks on civilian targets and respect humanitarian obligations. The Pope has framed the war in stark moral terms: “War only begets more war and causes enormous suffering. It is time to halt the spiral of violence.”, as first reported by the Crux

That language draws on a tradition running through modern Catholic social teaching — from Benedict XV’s anguished pleas during the First World War to John Paul II’s opposition to the Iraq invasion — insisting that armed conflict, whatever its proximate causes, generates evils that outrun any political objective achievable by force. The Catechism of the Catholic Church teaches that the evaluation of conditions necessary for morally legitimate armed force is subject to “rigorous conditions,” and that nations bear a duty to pursue every peaceful means before and during conflict.

Further Meetings and the Russian Catholic Community

Gallagher’s schedule in Moscow extended beyond the Lavrov meeting. On Tuesday evening he met Metropolitan Anthony of Volokolamsk, a senior figure in the Russian Orthodox Church — a conversation likely touching on the complex relationship between Rome and Moscow that has been strained in part by differing ecclesiastical positions on the war. On Wednesday he was scheduled to meet Yuri Ushakov, a senior Kremlin foreign policy advisor. On Thursday he planned to celebrate Mass with and address Moscow’s small Catholic community, which numbers well under one million in a country of more than 140 million people.

That pastoral dimension of the visit underscores what is always present beneath Vatican diplomacy: concern for the faithful caught in the crossfire, Ukrainian and Russian alike. Cardinal Pizzaballa’s recent visits to threatened Christian communities in the West Bank reflect the same pastoral-diplomatic logic the Vatican deploys in conflict zones — the Church goes where its people are, and speaks for peace on their behalf.

Whether Gallagher’s mission moves any needles in Moscow remains to be seen. The Vatican has no army, no sanctions regime, and no security guarantees to offer. What it has is moral authority, an ancient diplomatic tradition, and — as Tuesday’s meeting suggested — a seat at a table that few others can reach.