It recommended using geometric lines of latitude and longitude to convey a three-dimensional Earth on a two-dimensional surface, and it included the co-ordinates of over 8,000 locations in the ancient world.
Firstly it's because of statues which now are white, but at the time would mostly have been painted in quite bright colors, but this has kind of tainted our idea of what the ancient world looked like.
Perhaps their greatest achievement was to make their capital city Alexandria into the most brilliant metropolis of the Greek-speaking world for centuries it was second only to Rome.
But when the Huns and Germanic peoples began their invasions of the Italian peninsula, it generated one of the ancient world's greatest refugee crises.
Today we learned that gods in the ancient Mediterranean world seemed highly ambivalent about their creations, especially humans, but ESPECIALLY creeping things.