QUICK FACTS:
People groups: 1,379
Population: 1,253,478,485
Unreached people groups: 598
UPG population: 423,009,205
Unengaged UPGs: 250
UUPG population: 28,429,655
Number of countries: 143
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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