reformationa sixteenth-century movement that challenged established religious practices and led to the creation of Protestant churchesMartin Luther's ninety-five theses in 1517 are widely considered the catalyst of the Protestant Reformation.NoteMartin Luther's ninety-five theses in 1517 are widely considered the catalyst of the Protestant Reformation.Elon.io is an online learning platformWe have an entire course teaching TOEFL Academic Vocabulary grammar and vocabulary.Start learning TOEFL Academic Vocabulary now