In this activity you will read an excerpt from Luther's Ninety-Five Theses. You will then examine some of the major ideas in Luther's theses. Part A Explain what Luther meant by the word indulgence. How are indulgences related to the concept of sin? Use the Internet to research any relevant background information, including the religious practices of the time and the historical context of Martin Luther's debate with the authorities of the Roman Catholic Church. Font Sizes