Pope Francis's death at the age of 88 means the Catholic Church must choose a new leader. Here's how cardinals elect the next pontiff at the conclave.

Roman Catholic faithful began visiting the tomb of Pope Francis on Sunday, filing past the simple white tomb in St. Mary Major Basilica a day after he was bade farewell by the powerful of the world and a crowd of hundreds of thousands.

No pope had been laid to rest outside the Vatican in more than a century, but Francis opted instead for burial in Santa Maria Maggiore, located in the Italian capital's most multi-cultural neighbourhood.

Current and former U.S. presidents and other world leaders gathered at the Vatican for Pope Francis' funeral. Chloe Kim