Archbishop of Canterbury and Pope meet for first time
15 June 2013 Last updated at 00:29 GMT
The Archbishop of Canterbury has met Pope Francis for the first time since the pair became leaders of their respective Churches in March.
Pope Francis said they shared a common desire for economic and social justice.
The Roman Catholic leader in England and Wales, Archbishop of Westminster Vincent Nichols, is also on the visit.
Alan Johnston, the BBC's Rome correspondent, said the Pope had spoken of the need to listen to "the cry of the poor", and ensure that they were not abandoned to the laws of the markets.
The Vatican has praised Archbishop Welby, who has spoken out against plans to allow same-sex couples to marry, for working with Roman Catholic leaders in Britain to "safeguard" marriage and other Christian values.
The archbishop became leader of the Church of England - and leader of the worldwide Anglican Communion - in March, days after Pope Francis was inaugurated as the Supreme Pontiff of the Roman Catholic Church.
The Pope said this was a "particular reason to support one another in prayer".
But in his Vatican address, the Pope described the relationship between the two Churches as "long and complex, and not without pain".
He touched briefly on tensions that arose when his predecessor set up a structure that helped unhappy Anglicans defect to Catholicism.
He said he was grateful for the "sincere efforts" the Church of England had made to understand why Pope Benedict XVI established the personal ordinariate.
Archbishop Welby, who is visiting Rome with his wife, wore, as is customary for visiting archbishops, an episcopal ring given to Archbishop Michael Ramsey by Pope Paul VI in 1966.
Pope Francis with Shimon Peres
Francis could organise peace meeting between world’s three major religions, in Rome
Israeli government sources say the Pope spoke to President Shimon Peres in a meeting between Jews, Christians and Muslims, aimed at speaking out against violence. Rabbi Rosen has asked for steps to be taken to bring peace to the Holy Land
President Peres “told the Pope that there are people who use God’s name to justify terrorism” and religious leaders should “say out loud that God did not give anyone permission to kill their neighbour.” According to the information contained in a summary of the Audience received by the Israeli government, Francis told Peres he “whole-heartedly supported” his appeal against violence and that “he wanted to promote a meeting between religious leaders and faithful of the three major religions” founded by Abraham, “in Rome”. The aim would be to “make people see” that the religions “oppose violence and terrorism.”
If these statements were indeed made during the Audience, it looks like the Pope is thinking about possible peace initiatives that would be restricted to the world’s three major monotheistic faiths. It would not be an interreligious meeting involving all faiths, like the Assisi gatherings organised by John Paul II and then by Benedict XVI in 2011. Readers will remember that in January 2002, just a few months after the 9/11 attacks in the U.S., Pope John Paul II convened a special meeting of religions in Assisi, in order to make it crystal clear that in no way could violence and terrorism be justified on theological grounds.
But in Israel, there are those who would like religions to nudge politicians to come up with viable solutions to the conflict in the Middle East. The President of the International Council of Christians and Jews (Iccj), Rabbi David Rosen, has asked the Pope to help leaders of the Jewish and Muslim religions to promote an initiative for peace in the Holy Land. Speaking to a group of Italian journalists, Rosen suggested the Pope convene a meeting between the Holy Land’s religious leaders, in Jerusalem, to pray for peace in the region. “2015 could be a perfect time to do this as it will mark the fiftieth anniversary of the promulgation of “Nostra Aetate”, the Second Vatican Council declaration on the Relation of the Church with Non-