@farmerman,
The Office of the Inquisition was particularly charming. Members of the church were not allowed to shed blood, so they used red-hot irons, thumb screws, racks--that sort of thing.
Ask the Jews about the tender mercies of Christians--of any flavor.
The Renaissance grew out of texts which came to Europe both from the Middle East, after the crusades began in the late 11th century; and from the Iberian peninsula as a result of the
reconquista. Scholars writing in Arabic had a great deal to contribute on their own account, but most importantly, they preserved the wisdom of the Ancients of the Classical Greek and the subsequent Hellenistic worlds. Hobbit Bob (for those who remember him) once pointed out that many, perhaps even most, of those texts already existed in Europe. But texts mouldering in some monastic library, and texts eagerly passed from hand to hand and avidly consumed are two quite different kettles of fish.
The Royal Libraries and the Museion of the Ptolemids were destroyed over time, in the first century BCE, the third century CE, the late 4th century CE--which was the notorious burning of the library and its chief librarian, Hypatia. She was actually killed when the Museion was burned. The Emperor Theodosius had authorized the destruction of pagan shrines, and the Coptic patriarch jumped on the opportunity to destroy these institutions. Christians have always correctly seen the acquisition and the preservation of secular knowledge as a theat to their dominion. Modern scholars reject the stories of the destruction of what remained of the libraries by the Muslim conquerors of Egypt in the seventh century. It is likely that these stories were spread by Christians seeking to disparage the Muslims, and then were re-inforced when Yusouf, Sala'-al-Din (Saladin) burned Isma'ili libraries, and who wanted to justify destroying the libraries of the Fatamids in Cairo by appealing to a mytical, earlier event claimed to have been authorized by the Calif. There was little enough left to destroy in the 7th century, never mind the 13th.