Pope Francis' funeral will be held on Saturday, April 26, at 10.00 a.m. (0800 GMT) at St. Peter's Basilica, the Vatican said in a statement.

The body of Pope Francis will be taken to St. Peter's Basilica on Wednesday morning at 9:00 a.m. (0700 GMT), it added.

His body is currently laid out in a coffin in the chapel of the Santa Marta residence, where he lived during his 12-year papacy.

Cardinals gathered at the Vatican on Tuesday to plan Pope Francis' funeral, which leaders from around the world will attend ahead of a conclave next month to elect a new head of the Roman Catholic Church.

Francis, 88, died unexpectedly on Monday after suffering a stroke and cardiac arrest, the Vatican said, ending an often turbulent reign in which he repeatedly clashed with traditionalists and championed the poor and marginalised.

The pontiff spent five weeks in hospital earlier this year suffering from double pneumonia. But he returned to the Vatican almost a month ago and had seemed to be recovering, appearing in St. Peter's Square on Easter Sunday.

The Vatican on Tuesday released photographs of Francis dressed in his vestments and laid in a wooden coffin in the chapel of the Santa Marta residence, where he lived during his 12-year papacy. Swiss Guards stand on either side of the casket.

His sudden death set in motion ancient rituals, as the 1.4-billion-member Church started the transition from one pope to another, including the breaking of the pope's "Fisherman's Ring" and lead seal, used in his lifetime to seal documents, so they cannot be used by anyone else.

U.S. President Donald Trump, who clashed repeatedly with the pope about immigration, said he and his wife would fly to Rome for his funeral. Among other heads of state set to attend were Javier Milei, president of Francis' native Argentina and Ukrainian President Volodymyr Zelenskiy, according to a source in his office.

In a break from tradition, Francis confirmed in his final testament released on Monday that he wished to be buried in Rome's Basilica of Saint Mary Major and not St. Peter's Basilica.

The gathering of cardinals will also review the day-to-day running of the Church in the period before a new pope is elected.

A conclave to choose a new pope normally takes place 15 to 20 days after the death of a pontiff, meaning it should not start before May 6. Some 135 cardinals are eligible to participate in the highly secretive ballot that can stretch over days.

At present there is no clear frontrunner to succeed Francis.

PROGRESSIVE

Pope Francis inherited a Church in disarray and worked hard to overhaul the Vatican's central administration, root out corruption and, after a slow start, confront the scourge of child abuse within the ranks of the priesthood.

Francis appointed nearly 80% of the cardinal electors scattered across the world who will choose the next pope, increasing, but not guaranteeing, the possibility that his successor will continue his progressive policies.

Many of the cardinals are little known outside their own countries and they will have a chance to get to know one another at meetings known as General Congregations that take place in the days before a conclave starts and where a profile of the qualities needed for the next pope will take shape.