Christianity of which Roman Catholicism is the most prominent.
no it was found in Rome hints the name
The most common religion is Roman Catholicism.(catholic)
Catholicism is most common in Western Europe, predominately Southern (Portugal, Spain, and Italy).
Roman Catholicism
Catholicism.
Most Irish are Catholics
Catholicism.
Catholicism.
Roman Catholicism
Roman Catholicism
Roman Catholicism (80% or more of the population has such beliefs)