These theses largely protested clerical abuses in the Catholic Church at the time, in particular the dealing of indulgences and issues around papal authority.
e.g. Thesis 86:
“Why does the pope, whose wealth today is greater than the wealth of the richest Crassus,** build the basilica of Saint Peter with the money of poor believers rather than with his own money?”
This event is thought by many to have been the initial spark for the Protestant Reformation. Read the rest of this entry