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How much do you know about the Catholic Church? Take our quiz!

Can you tell your aspergillum from your alb? Your cassock from your chasuble? Take our quiz on all things Roman Catholic to test your knowledge of one of the world's oldest, largest, and most powerful institutions. 

Thousands of people attending the installment Mass of Pope Benedict XVI in St. Peter's Square, at the Vatican in 2005.
Gregorio Borgia/AP/File
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Question 1 of 25

1. What country has the largest total number of Roman Catholics?

The United States