Italy has the largest population of catholic Christians at-least 90 percent of Italian claim themselves as Catholic Christians and they are actively practicing, <u>"Vatican City" is the nerve center of Roman Catholicism and the home of pope sits within the city of Rome.</u>
Spain does not have any official religion in-spite of that<u> 90 percent population of Spain claim themselves as Roman Catholic</u> and keep practicing.
England <u>72 percent population consists of Roman Catholic</u> this means one out of 12 people is Catholic.