Crowds gather at Vatican Square
Up to a million people are expected at the Vatican to attend the inauguration Mass for Pope Francis.
Political and religious leaders from around the world are also attending the Mass in St Peter's Square, marking the official start of his papacy.
The first pontiff from the Americas, he has suggested he will take a more modest approach than his predecessors.
Louisa Baldini reports from Vatican Square.
19 Mar 2013