Pope Francis on Sunday called on Hungarians to “open doors” to migrants, as he wrapped up a three-day visit to the central European country led by a prime minister who is staunchly anti-immigration.

Throughout his visit to Budapest, dominated by the war in neighbouring Ukraine, Pope Francis emphasized a welcoming stance towards those fleeing conflict or poverty.

His comments have stood in stark contrast to the stance of  the Hungarian Prime Minister Viktor Orban, who, while welcoming Ukrainian refugees, has otherwise espoused anti-migration rhetoric to defend a “Christian Europe” since coming to power in 2010.

Some 50,000 Hungarians, including Orban, listened to the pope lead an open-air mass at a central Budapest square under tight security, during which the Argentine pontiff urged all, including “those with political and social responsibilities”, to be more open.

“Please, let us open those doors!” said the 86-year-old pontiff, adding that it was sad and painful… to see closed doors.

“The closed doors of our selfishness with regard to others… the doors we close towards those who are foreign or unlike us, towards migrants or the poor,” said Francis.

At the end of the mass, the pope prayed for the “beleaguered Ukrainian people and the Russian people” and for “a future of hope, not war, a future full of cradles, not tombs, a world of brothers and sisters, not walls and barricades”.

University student Levente Kiss, 21, who was among those thronging the mass, welcomed the pope’s stance “that really calls us to our Christian mission to support the people in migration crises, especially the war in Ukraine”.

On Sunday night, aboard his papal plane on the flight back to Rome, Francis told journalists he was willing to help facilitate the return of Ukrainian children who have been taken to Russia.

Ukrainian Prime Minister Denys Chmygal made that request to the pope on Thursday during an audience with the pontiff.

Noting that the Holy See had successfully acted as an intermediary in past prisoner exchanges, Francis said that in this case an attempt “could also go well.

“The Holy See is disposed to do it because it’s right, it’s the right thing and we should help,” the pope said.

Stressing that he was willing to do everything necessary for peace in Ukraine, he added: “A mission is underway, but it isn’t yet public”, but did not elaborate.