Inquisition: An official investigation conducted by religious authorities to identify and suppress heretical beliefs.
Council of Trent: A meeting held by the Catholic Church in response to the Protestant Reformation, aimed at addressing heresies and reaffirming traditional teachings.
Galileo Galilei: An Italian scientist who was accused of heresy for supporting heliocentrism (the idea that Earth revolves around the sun) instead of geocentrism (the belief that Earth is at the center).