Statistics for occurrence #1 of “Roman Catholic” in entry charles-i of Harper's Encyclopedia of United States History:

...eir-apparent to the throne, which he ascended as King in 1625. He sought the hand of the infanta of Spain, but finally married (1625) Henrietta Maria, daughter of Henry IV. of France. She was a Roman Catholic , and had been procured for Charles by the infamous Duke of Buckingham, whose influence over the young King was disastrous to England and to the monarch himself. Charles was naturally a good man...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
Roman Catholic 302 88 0 0 0 user votes
English Roman Catholics 30 30 0 0 0 user votes
Irish Roman Catholics 2 0 0 0 0 user votes

† This entity has been selected by the automated classifier as the most likely match in this context. It may or may not be the correct match.