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#8 - Poland - 33,037,017 Catholics
85.8 percent of Poland's population identifies as Catholic. The Christianization of Poland began with the baptism of Mieszko I, from the Piast dynasty, on the Holy Saturday of the year 966. By the 13th century, Catholicism had become the most extended religion throughout the country, and Christian Poles coexisted with a significant Jewish community, which comprised 10% of the country's population until WWII.  The country that produced Pope St. John Paul II, Saint Faustina Kowalska, Saint Maximilian Kolbe and many others, hold them as a powerful symbols of their faith.

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