And if you’re thinking that medieval scholars were way too on the ball to allow the circulation of an error like that in the Glossa, the Donation of Constantine has a whopping pile of theological errors which for centuries hobbled the papacy. (Since the forged document claimed that Constantinople was the property of Rome, most people who know of it presume that various Pope’s gullibility was self-serving, totally ignoring the fact that it also falsely purported that the apostles had advocated a highly decentralized ecclesiastical structure, which for five centuries left Rome largely barren of population, broke, and powerless.) People didn’t have the internet back then, and they fastidiously preserved anything; many people who might have doubted Strabo’s assertions would nonetheless never even contemplate “correcting” a historical document.