How does religion in the 14th century compare to the religion in Romeo and Juliet?

Religions tend to change slowly over time, and so geography tends to matter more than history to a question like this. That is to say that it makes a big difference whether you are talking about 14th century religion in Italy or Arabia or India or China or Japan or somewhere on the Guinea coast. But if you are talking about the religion in one place, say Verona in Italy, the predominate religion in the 14th century was the same as it was in the 16th century or, if truth be told, in the 21st century or the 6th century. The religious practices in Romeo and Juliet are Roman Catholic, and that hasn't changed a lot over the years.