Medieval Times

“We have no tolerance for fake news ... fake tans we love.”
My favorite characters are Mike and Evie. Evie is one of my favorites because, unfortunately for her, her magic always goes
During the Hundred Years' War, England had a centralized, state-controlled organization for manufacturing arrows in bulk. These were then issued as required to the soldiers on campaign.
Larger monasteries and the chapterhouses of cathedrals would have rung bells to summon the community to these prayers, and peasants and farmers living nearby would have had their day divided up by the ringing of these bells.
Virtually no movies about the Middle Ages are "very realistic." Most are little more than fantasies minus the dragons, with costumes, weapons and settings completely made up by the film makers with some kind of vaguely "medieval" theme in their heads.
People in the Middle Ages considered healthy, white teeth a sign of beauty and wrote of sweet smelling breath as a desirable attribute. So, not surprisingly, we have extensive evidence that people liked to keep their teeth clean and a large amount of evidence of tooth pastes, powders and treatments, as well as mouth washes and treatments for halitosis.
Unlike Medieval knights, the knights of New Jersey get health insurance and workman's compensation. We learned, for example
We put GoPros on the Knights of Medieval Times theme restaurant in Lyndhurst New Jersey to see what it like to go into battle.
The idea that people routinely emptied chamberpots out windows into the street is one of the images of the past that has been taught to generations of school children. It's usually said to have been done in the Middle Ages and it's an image that has stuck with many people, particularly because we find it so disgusting. Unfortunately, like many popular ideas about the Middle Ages, it's largely nonsense.
What are examples of things that are "common knowledge" about history that historians almost universally consider incorrect?