An example of ideas spreading due to the print revolution, the Ninety-Five Theses written by Martin Luther transformed Christianity. Luther, a German monk, vocalized in the theses what he believed was unhealthy about the Catholic Church, including the selling of indulgences and the impersonal, robotic process of sacraments that religion had become. This document sparked the first protestant branch of Christianity. This document adds to the complexity of the Renaissance relationship to Christianity as many aspects of life were becoming more secular. The image is from Wikipedia and is labeled Public Domain.