Protestant Reformers were those theologians, churchmen and statesmen whose careers, works and actions brought about the Protestant Reformation of the 16th century. Historically speaking, "Protestant" was the name given to those theologians, magnates and delegations present at the Holy Roman Imperial Diet of Speyer in 1529 who protested the revocation of the suspension, granted at a prior Diet of Speyer in 1526, of Edict of Worms of 1521, which had outlawed Martin Luther and his followers.
There were a number of people who contributed to the development of the Reformation, but lived before it, including:
There were a number of key reformers within the Magisterial Reformation, including:
Reformers of the Radical Reformation and the Anabaptist movement included:
Second Front Reformers
There were also a number of people who initially cooperated with the Radical Reformers, but separated from them to form a "Second Front", principally in objection to sacralism. Among these were:
Roman Catholics who worked against the Protestant Reformation included: