Chi. Chikyuu no Undou ni Tsuite

As a historical fiction, this is a fairly accurate depiction of how the church controlled the narrative through violence.

All the supposed witches who were burned and drowned, all the scientists who were executed are not forgotten. This is a tribute to those who gave up their life gladly so that we can pursue the truth.

Even though it is fiction, the situation depicted here is fairly accurate for majority who pursued science in the face of persecussion by the church. The fact that the church had an "Index of Forbidden Books", a changing list of publications deemed heretical or contrary to morality, makes it harder for the audience to take this as a fiction. The anime did a great job depicting that time period.