Medieval castle toilet:
Since toilets project from the side of the castle and basically provide a free hole in the wall for any enemy with a grappling hook, a strong stomach and no sense of smell, they’re often the weakest point in a castle’s defenses. Toilets were equipped with stout lids that could be latched to keep intrepid climbers out!
Marksburg’s toilet opened over the garden, interestingly. Not sure how that one worked out for the medicinal herbs.