Filthy Medieval Times. Myths and Legends about Hygiene

The book by historian and reenactor Ekaterina Mishanenkova is dedicated to debunking popular myths about the Middle Ages.
In the Middle Ages, people were terribly dirty and smelly - they never washed, did not wash their clothes, knights relieved themselves right... under themselves, in their armor, and wide-brimmed hats were worn to protect against slops and the contents of chamber pots, constantly being thrown out of windows. Queen Isabella of Castile swore not to change her underwear until the Moors were expelled from Spain and only washed twice in her life. Louis XIV smelled "like a wild beast." King Frederick Barbarossa nearly drowned in filth. And scented curtains were hung on the windows of the British Parliament to protect against the stench coming from the Thames.
What of this is true and what is fiction? How was a medieval bath or toilet actually arranged? How did they wash clothes and what fragrances did our ancestors use? Let's turn to the facts.