After weeks of defying international pleas to free eight European officials they had captured in May, pro-Russian rebels in east Ukraine released them unexpectedly in June following a public appeal by the head of the Russian Orthodox Church, Patriarch Kirill.
The role Kirill's resurgent church played in the release of the monitors, who were from the Organisation for Security and Cooperation in Europe (OSCE), sheds light on how a close cooperation between the state and the church in Russia is now playing out in Ukraine.
What the Russian Orthodox Church (ROC) presents as its humanitarian mission in east Ukraine, Western diplomats see as a pattern of cooperation in which the church is acting as a "soft power" ally of Russian President Vladimir Putin.
During the OSCE monitors' captivity, Moscow gave no public indication that it was heeding calls to help their release by using its influence with the rebels fighting to split east Ukraine from Kyiv.
But what looked like a solo venture by Kirill was the culmination of a flurry of diplomatic contacts that, behind closed doors, involved the OSCE, Russian and church officials, separatist leaders and a rebel Cossack unit, according to interviews with parties to the talks.
With questions lingering over Moscow's role in the turmoil in east Ukraine that has killed more than 3,500 people, European diplomats say the ROC was used to strike a deal and conceal Moscow's influence with the rebels.
The ROC, which claims jurisdiction in most of the former Soviet world, used its leverage beyond Russia's borders merely to mediate, it said.
"(The church) was asked to take part. Why shouldn't it help?" Metropolitan Merkury, Kirill's contact man for the OSCE release, told Reuters.
The crisis in east Ukraine, which followed Moscow's annexation of Crimea in March, threw ties between the Kremlin and the West deep into disarray. The West responded with sanctions to what it says is Moscow arming the rebels and reinforcing them with Russian troops. Moscow denies taking part in the armed conflict in spite of growing evidence to the contrary.
"Russia does not fully control the rebels but it does exercise influence over them," said a Western diplomat in Moscow closely following the crisis. "The Church is put in between the two to blur that link and avoid having any direct lines between them."
A European diplomat in eastern Ukraine said the ROC had acted as Moscow's "front organization" in the release of the OSCE captives, allowing the Russian state to continue denying it had any direct involvement.
The OSCE said it was a mix of interventions that made the release possible. A spokesperson for the Russian Foreign Ministry declined to comment on the OSCE case. The person said the ministry does not favor the ROC over other creeds it works with. The Kremlin was not available for comment.
THE RUSSIAN WORLD
The ROC says it is not the state church of Russia. But it has cooperated closely with the Kremlin under Putin, who helped it make a striking comeback from heavy oppression in the Soviet era.
The ROC and Kirill, who once famously likened Putin's long rule to "a miracle of God," are active in promoting Russia's culture abroad and strengthening ties with compatriots around the world, helping the Kremlin boost its leverage on the global stage.
Putin and Kirill share a vision of "the Russian world" based on common ideological values, a belief driving their mutually-beneficial cooperation and crusade against a common threat they see in the West.
The ROC has built or restored about 25,000 churches in the past quarter-century, most of them in its traditional territory of the former Soviet Union. But it has also reclaimed churches in countries from France and Italy to Cuba and North Korea. With about 200 million members worldwide, the ROC is now the second-largest single church in Christianity after Roman Catholicism.
The ROC's Department of External Church Relations has a working group with Russia's Foreign Ministry that meets regularly for what Foreign Minister Sergei Lavrov has called "active and constructive" cooperation.
Senior officials in the ROC, still dogged by rumors of Soviet-era collaboration with the KGB secret police, are used to being asked whether they are too close to Putin.
"To people who, in a certain manner, ask me if our relationship with the state is good today, I say: 'Do you want it to be bad?'," said a senior ROC spokesman, Vladimir Legoyda.
"Do I think that the state may try to use the Church for its own purposes? Probably. Do I think we should be afraid of that? No."
Under Putin, the ROC gets support from the state and powerful oligarchs allied to the Kremlin, while Moscow benefits from its public blessing. A recent poll showed 75 percent of Russians approve of the ROC and more than half value its close ties with the state.
One influential financier is Konstantin Malofeev, a Russian Orthodox businessman and philanthropist whose St. Basil the Great Foundation paid for the renovation of the Moscow headquarters of the ROC's Department of External Church Relations.
The foundation's board includes Igor Shchyogolev, one of Putin's aides at the Kremlin. The fund says it offers humanitarian aid for the rebel-held east Ukraine under an agreement signed with Aleksander Borodai, formerly the top separatist leader.
In July, Kyiv opened an investigation into Malofeev, alleging that he was financing armed rebels in east Ukraine. The European Union sanctioned Malofeev soon afterwards, saying he used to employ Borodai and was destabilizing Ukraine. Malofeev did not respond to Reuters' request for comment on that.
He has previously dismissed Kyiv's investigation as "ridiculous," saying he sent only humanitarian aid and had sent no funding to pro-Russian separatists.
Another powerful figure in the Orthodox world is Vladimir Yakunin, head of Russian Railways and a long-standing ally of Putin. Yakunin, sanctioned by Washington over Ukraine, heads the St. Andrew the First-Called Foundation, which helped reunite Kirill's Moscow Patriarchate and the Russian Orthodox Church Outside Russia, which separated from the ROC in the 1920s.
At the 2007 Moscow ceremony marking the reunification, Putin called the merger "an event of truly nationwide, historic importance and great moral significance." He added: "The revival of the church unity is a crucial condition for revival of lost unity of the whole 'Russian world', which has always had the Orthodox faith as one of its foundations."
CHURCH AT CROSSROADS
The ROC's close ties to the state were on display early in the Ukraine crisis when Kirill and the Russian Foreign Ministry issued nearly identical statements, warning against a confrontation and speaking of the larger Russia's "brotherly" Ukraine.
When Russia sent its troops to Crimea, one of the justifications it used was an alleged threat to parishes there linked to Kirill's Moscow Patriarchate. Kirill's full title is "Patriarch of Moscow and All Rus," a reference to a medieval state in Kyiv to which modern Russia traces its roots.
In Ukraine, Kirill oversees the Ukrainian Orthodox Church of the Moscow Patriarchate. It competes against a smaller church of the Kyiv Patriarchate that split from Moscow after the collapse of the Soviet Union.
Winning applause from those Ukrainians who seek Western integration and scorn Moscow's efforts to undermine it, the Kyiv Patriarchate has strongly backed Ukraine's national cause in the current conflict. Its head, Patriarch Filaret, blamed Putin squarely for the violence and said he was possessed by Satan.
The conflict in Ukraine has put strains on the ties between the ROC and the state in Russia; and Kirill, wary of alienating worshippers in Ukraine by being too closely associated with the Kremlin, has increasingly hedged his bets.
He was conspicuously absent from a March ceremony where Putin sealed the annexation of Crimea, and he has not taken over two dioceses from the Ukrainian church in the peninsula even though they sit on territory now controlled by Russia.
Late last month, Kirill told a meeting with Orthodox media that it was "fundamentally wrong" to view the ROC as a vehicle of Russian state policy. But to many in Ukraine that sounded unconvincing, and controversy over the ROC's role in the OSCE monitors' case adds to that scepticism.
Back in May, the OSCE, through the Russian Foreign Ministry, got in touch with Russian lawmaker and senior Cossack leader, Viktor Vodolatsky, according to his account.
Vodolatsky, a member of Putin's ruling United Russia parliamentary faction, said he contacted the head of Cossack forces in east Ukraine, Nikolay Kozitsyn. He said ROC's Metropolitan Merkury also talked to Kozitsyn.
"He (Merkury) knows every ataman (Cossack leader) among us," Vodolatsky told Reuters. "It was no problem for him to take his phone, call Kozitsyn and solve all the problems with him."
Merkury declined to specify his or the church's role in the OSCE case.
Kirill's appeal for the monitor's release was the clincher, said Vodolatsky, whom the EU sanctioned over the Cossacks fighting on the rebel side in east Ukraine.
"For any Cossack the Orthodox faith is predominant. The Patriarch is our spiritual leader," he said. "After the Patriarch statement everyone stood at attention and did everything that the Patriarch ordered."
Gabriela Baczynska, Tom Heneghan, Reuters