Probably the Orthodox church.
The Eastern Orthodox Church is first most similar to the Catholic Church but I am not sure which other church is the most similar. I am thinking it is the Anglican church but I am not entirely certain on that..AnswerThe Old Catholic Church, and the Polish National Church, both of which broke from the Church after Vatican Council I; along with the Eastern Orthodox Church are the only Churches that can be so called as they still have valid Orders (they still have a valid priesthood and sacraments). The Anglican "church" is the protestant communion that looks most like the Catholic Church.
The Anglican Church is not called the Anglican Catholic Church, and the Catholic Church is not formally known as the Roman Catholic Church even though the Vatican is indeed located in Rome. Your question therefore would more accurately read, can an Anglican priest say Mass at a Catholic Church. The answer is, the Catholic religion does not allow Anglican priests to officiate at their rituals. The Anglican Church, despite being extremely similar to the Catholic Church in most respects, is nonetheless regarded by Catholicism as a heretical schism.
The Catholic Church
Corrupted by PowerThe Roman catholic church was the most powerful church in the whole of Europe at that point lol
Most of the pews are in the nave in a Church.
The Catholic Church and the Democratic Party apex
Most likely, a Catholic Church.
Catholic church or Church
In most countries, in most times, the Catholic Church only taxes the parishes, not individuals. Unless you can ask a more specific question, I would have to say that 1) there are no Catholic Church tax policies for people, and 2) The Catholic Church is the Mystical Body of Christ, and, thus, cannot be "weakened".
In all of Europe before the eleventh century, the Roman Church was most powerful. In 1056, the Great Schism, which had been coming to a head for hundreds of years, split the Church into the Roman Catholic Church, in the West, and the Eastern Orthodox Church, in the East, and each of these was most powerful in its own sphere.
This is called a schism the most famous being the Great Schism.
The Vatican.