Pope Francis has joined pilgrims in St Peter's Square to preside over the funeral of his predecessor, who resigned from the papacy in 2013.

The dome of St Peter's basilica at the Vatican was shrouded in mist as the cypress-wood coffin containing Pope Benedict XVI's body was brought out and placed on the steps.

There was applause from the faithful who had gathered for the funeral. Benedict was then interred in a tomb beneath the basilica.

Clergy from around the world had come - cardinals in red vestments, nuns and monks in their dark robes.

Pope Francis was brought out on to the dais in a wheelchair. Latin chants sung by the Sistine Chapel choir echoed across the square. The mood was solemn and subdued.

During the Mass, concelebrated by cardinals, bishops and priests, Pope Francis spoke of "wisdom, tenderness and devotion that he bestowed upon us over the years".

Some 50,000 mourners came to the funeral, according to police. Official delegations were there from Italy and from former Pope Benedict's home country of Germany.