Protestant
Six princes of the Holy Roman Empire and rulers of fourteen Imperial Free Cities, who issued a protest (or dissent) against the edict of the Diet of Speyer (1529), were the first individuals to be

Pre-Reformation
One of the earliest persons to be praised as a Protestant forerunner is Jovinian, who lived in the fourth century AD. He attacked monasticism

Unlike mainstream Lutheran, Calvinist and Zwinglian movements, the Radical Reformation, which had no state sponsorship, generally abandoned the idea of the "Church visible" as

Protestants can be differentiated according to how they have been influenced by important movements since the Reformation, today regarded as branches. Some of these

Main principles
Various experts on the subject tried to determine what makes a Christian denomination a part of Protestantism. A common consensus

Protestants refer to specific groupings of congregations or churches that share in common foundational doctrines and the name of their groups as denominations. The term denomination

There are also Christian movements which cross denominational lines and even branches, and cannot be classified on the same level previously mentioned forms. Evangelicalism is a prominent example. Some of those movements are active exclusively within