History of the Catholic Church in the United States - Wikipedia
https://en.wikipedia.org/wiki/History_of_the_Catholic_Church_in_the_United_States
The Catholic Church in the United States began in the colonial era, but by the mid-1800's, most of the Spanish, French, and Mexican influences had institutionally and demographically faded, owing to the Louisiana Purchase (1803) and the Treaty of Guadalupe Hidalgo (1848). The former territories of France, Spain, Mexico and the domains of the Native Peoples at the time were …
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