Chouara Tannery, largest of the three tanneries in Fez, Morocco, was built in the 11th century and leather goods have been produced there using the exact same method for more than a thousand years. Skins are first placed into the white vats, which contain a mixture of water, limestone, and pigeon droppings. The limestone helps to remove hair from the skins while the acid in the pigeon droppings softens the hides. Three days later the skins are removed and washed, after which they are placed in the dying pits.
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