It says something about me that I see Aswan and think Syene because the ancient city of Syene lies beneath modern day Aswan. When Eratosthenes measured the circumference of the Earth, he used Syene and Alexandria as the endpoints of his reference angle.
Also, for a couple of millennia the "prime meridian" ran through Alexandria. It was later shifted to Greenwich, though some place it through Paris.
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Also, for a couple of millennia the "prime meridian" ran through Alexandria. It was later shifted to Greenwich, though some place it through Paris.