How did common people become familiar with Christian ideas as Christianity spread to barbarian people?

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Monasteries and cathedrals served as centers of learning where monks and clergy would write hymns, prayers, and stories from the lives of Christ and the saints to spread Christian teachings. These religious texts were often copied and distributed among local communities, making them familiar with Christian ideas. Additionally, missionaries and clergy would also actively preach and evangelize to non-Christian peoples, further spreading the religion. However, there is no evidence that priests established in each village or theatrical troops performing stories from the Bible were widespread practices for spreading Christianity to barbarian people.

How Did Common People Become Familiar with Christian Ideas as Christianity