the Great Schism And the Schism of 1054, was the break of communion between what are now the Catholic Church and Eastern Orthodox churches.
Luther was sent to Rome, where he witnessed the corruption of the Roman church. He had climbed the Scala Sancta.
The Catechism of the Catholic Church describes an indulgence as "a remission before God of the temporal punishment. Luther was ordained to the priesthood in 1507.
The five solae of the Protestant Reformation are a foundational set of principles held by theologians and clergy to be central to the doctrine of salvation as taught by the Lutheran and Reformed branches of Protestantism.