Mother Teresa became St. Teresa much more quickly than the Catholic Church usually allows. Pope Francis, the leader of the Roman Catholic Church, just made it harder for the next potential saint.
Typically, candidates for sainthood need evidence of at least two miracles, according to Catholic.org. That's still the case. But the process for determining whether or not a miracle occurred has grown more restrictive. It now requires six experts to approve a miracle, and a two-thirds majority vote from the Vatican's Congregation for Saints.
Why make the change?
St. Teresa's canonization was widely criticized, since the two alleged miracles attributed to her were called into question. The hospital she ran for the destitute in India was criticized by some for doing more harm than good.
There's no definitive number of Christian saints. The process of declaring a saint was formally set down in the 10th century and has changed little since then.
The purpose of the regulation is for the good of the [saints'] causes, which can never be separated from the historical and scientific truth...
Also, it usually takes much longer for a saint to be named. St. Teresa died in 1997 and was put on the track to sainthood just six years later, the Los Angeles Times reports.
Pope Francis has earned a reputation for casting aside some church traditions and focusing more on serving the poor and promoting equality, making the decision to tighten the rules for sainthood appear somewhat surprising.