QUICK FACTS:
People groups: 1,321
Population: 1,233,340,480
Unreached people groups: 579
UPG population: 424,953,700
Unengaged UPGs: 235
UUPG population: 26,684,975
Number of countries: 137
Base Religion: Christianity
Description: Roman Catholicism is the largest branch of the Christian church and is among the oldest religious institutions in the world. The Catholic Church teaches that it is the one true Church found by Jesus Christ and that its bishops are the successors of Christ's apostles.
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