Historical reports claim that the first bariatric surgery was performed in Spain, in the 10th century. D. Sancho, king of Leon was reported to be such an obese man that he could not walk, ride a horse or pick up a sword. This led him to lose his throne. He was then escorted by his grandmother to Cordoba to be treated by the famous Jewish doctor Hasdai Ibn Shaprut. He sutured the kings’ lips who could only be fed on a liquid diet through a straw, consisting of teriaca: a mixture of several herbs, including opium, whose side effects stimulated weight loss. King Sancho lost half his weight, returned to Leon on his horse and regained his throne! (Source)