Protestant means a group of christians who are neither catholic or orthodox.Today they number around 800 million,compared to 1.2billion catholics and 200 million orthodox.General uniting feature of this group which seperate them from both catholicism and orthodox church is that they reject the practice of 'intercession of saints'.
Protestant revolution of 16th century was not the origin of protestantism as catholics try to claim.The first protestant church was the apostolic church. (the church depicted in new testament do not pray to "saints" or use statues\images in prayer worship.) Thus it was protestant in essence.
catholics massacred many true christian groups like manichaens.paulicians,bogomils,waldensians,cathars who showed boldeness to protest against their idolatrous practice of 'intercession of saints',before the coming of protestant revolution.