The library of secrets

A 14th-century copy of Secretum Secretorum, including a portrait of a modern-looking Aristotle, to whom the text was attributed, Biblioteca Medicea Laurenziana, Plut.83.2 (14th century)

Who doesn't like a medieval secret? One of the enduring features of the medieval period is that of an age of secrecy. There's a secret in every corner, the dark centuries…