I spend a lot of time on here getting pissed off at myths about the Middle Ages, whether it's the idea that they didn't do philosophy, or that they were idiots who couldn't draw. These misconceptions are down to the myth of the Dark Ages. The Dark Ages is the way the medieval period is taught at school: you had the enlightened Roman Empire, a golden era of wisdom and liberty, then you had a millenium of pure wretchedness before the Renaissance kicked "Western civilisation" back into high gear.