What is a sentence for Roman Catholic Church?

You would use the phrase Roman Catholic Church as a noun, because it's a name. For example, "The Roman Catholic Church is headquarted in Vatacin City" or "John is a member of the Roman Catholic Church". Tip: there is no Roman Catholic Church. It is the Catholic Church.

.

Catholic Answer

Roman is an epithet first commonly used in England after the protestant revolt to describe the Catholic Church. It is rarely used by the Catholic Church.