QUICK FACTS:
People groups: 1,197
Population: 857,420,375
Unreached people groups: 539
UPG population: 417,179,600
Unengaged UPGs: 220
UUPG population: 25,931,925
Number of countries: 130
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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