The largest segment of Christianity is Roman Catholicism. It accounts for about 60 percent of all Christians. It is located in nearly every nation on earth.
Catholicism.
The vast majority of Europeans are from some denomination of Christianity. Catholicism prevails in some countries, while Protestantism prevails in others.
Christianity is the most dominant religion.
The main religion is Christianity; with the largest denomination being Presbyterian; there are also large Catholic and Anglican communities; and many other smaller denominations.
Christianity is a dominant religion in Europe, Australia & New Zealand, Southern Africa, and the Americas.
The dominant religion of the Cayman Islands is Christianity.
The dominant religion in the Roman Empire was the Roman religion until Christianity became the dominant religion.
Christianity--particularly Catholicism--is the dominant religion throughout Central and South America. However, because there are multiple countries in Central America, I'm not sure if all/any have adopted Christianity as their "official religion."
Christianity.
Christianity
Christianity
Christianity