The Dark Ages

Inquisition
Wikipedia - "The Dark Ages is the period of cultural decline or societal collapse that took place in Western Europe between the fall of Rome and the gradual recovery of learning between the ninth and thirteenth centuries. The period is called 'dark' in two senses, the first reflecting our lack of knowledge of the period and of any significant recorded history; the second reflecting the cultural darkness of the West at a time when there was no architecture of any significance, little philosophical and literary work, and when most of the great works of classical antiquity were 'lost'."
Wikipedia