Vatican City: Presidents, royalty and simple mourners bade farewell to Pope Francis on Saturday at a solemn funeral ceremony, where a cardinal appealed for the pontiff's legacy of caring for migrants, the downtrodden and the environment to be kept alive.

U.S. President Donald Trump, who had clashed with the pope on those issues, sat with the rows of foreign dignitaries on one side of Francis' coffin in the vast St. Peter's Square.

On the other side sat cardinals who will pick Francis' successor at a conclave next month, deciding if the new pope should continue with the late pontiff's push for a more open Church or cede to conserva-tives who want to return to a more traditional papacy.

The Argentine pope, who reigned for 12 years, died at the age of 88 on Monday after suffering a stroke. "Rich in human warmth and deeply sensitive to today's challenges, Pope Francis truly shared the anxieties, sufferings and hopes of this time," said Italian Cardinal Giovanni Battista Re, who presided over the funeral Mass.Pope Francis Funeral, Vatican City, St. Peter's Square, Migrants and Environment, Church Conclave, Global Dignitaries

The Vatican estimated more than 250,000 people attended the cere-mony, cramming the square and the roads around. They broke into applause when Re spoke of Francis' care for immi-grants, his constant pleas for peace, the need for negotiations to end wars and the importance of addressing climate change. They clapped loudly again at the end of the service when the ushers picked up the casket and tilted it slightly so more people could see.

Aerial views of the Vatican showed a patchwork of colours - black from the dark garb of the world's leaders, red from the vestments of some 250 cardinals, the purple worn by some of the 400 bishops and the white worn by 4,000 attending priests.