Pope Francis officially declared Mother Teresa a saint before a crowded St. Peter's Square Sunday morning, 19 years after her death.
Applause broke out from the tens of thousands in attendance even before Pope Francis finished the canonization at the start of Mass.
Globally revered by both Christians and non-Christians for her lifetime of service to the world's most destitute and sick, Mother Teresa most notably worked in the slums of Calcutta, India, and a number of other countries. Pope Francis described her as an "eloquent witness to God's closeness to the poorest of the poor."
His formal declaration marks a highlight for Pope Francis' Jubilee Year of Mercy, in which he recognizes the nun as an icon of mercy.
But the declaration of sainthood does not come without questions surrounding Mother Teresa's legacy, by critics who believe her fame exceeded her service.
As NPR's Julie McCarthy previously reported, many hold complex views of her work:
... she's also been severely criticized, most prominently by the late British writer Christopher Hitchens, who argued that Mother Teresa's true agenda was to convert the people she helped to Christianity and that her belief in the virtue of a suffering led her to withhold anything but the most rudimentary medical care.
Writer and Calcuttan Ruchir Joshi says it's not conversions that bother him but Mother Teresa's failure to use her indisputable clout to go beyond what he calls a self-serving cycle.
Setting controversy aside, what does this formal rite of canonization mean for her title — do we now call her "Saint Teresa?"
That would be correct — but Pope Francis clarified at the ceremony that for many, the name "Mother Teresa" will live on.