Protestantism encompasses forms of Christian faith and practice that originated with doctrines and religious, political, and ecclesiological impulses of the Protestant Reformation.
Various attempts to unite the increasingly diverse traditions within Protestantism have met with limited success.
Mainline Protestantism emerged out of the Reformation's separation from the Catholic Church in the sixteenth century, based on a theology which came to be characterized as the Five Solas.
The roots of the Armenian Apostolic Church go back to the first century.