The most powerful what? The Catholic Church, being the Mystical Body of Christ (see Acts 9:1-5, and 1 Cor 12:12-14) has been the most powerful institution on the earth since the day that Our Blessed Lord founded it, and send the Holy Spirit to guide it. However, if you are asking when it was most powerful numerically, or politically, or in some other fashion, then you need to ask a specific question.
Corrupted by PowerThe Roman catholic church was the most powerful church in the whole of Europe at that point lol
Catholic church or Church
The Holy Trinity!
The Kingdom of France became the largest and most powerful in medieval Europe by allying with the Catholic Church.
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.
The catholic church.
The Catholic Church
The Catholic Church and the Democratic Party apex
Much of Northern Europe, including Scotland, England, northern Germany, Scandinavia, Switzerland, and the Netherlands broke from the Catholic Church and formed different protestant churches, some of which, like England and Scotland were national churches. But Catholicism remained the most powerful Church with France, Spain, Portugal, Italy, Austria, Belgium, Southern Germany, and Lithuania remaining Catholic. Jesus Christ has always been the head of the Church with the Pope as his Vicar on earth.
Most of the pews are in the nave in a Church.
The Vatican.
The version of the Catholic Bible that is considered the most widely used and accepted by the Catholic Church is the New American Bible (NAB).