Missionaries: Individuals or groups who are sent to spread religious teachings to new regions or populations.
Printing Press: Invented by Johannes Gutenberg, it played a crucial role in disseminating information during the Reformation period by allowing for faster and more widespread production of books and pamphlets.
Vernacular Language: The use of common languages spoken by people in specific regions. The translation of religious texts into vernacular languages helped disseminate Protestant ideas among the general population.