To design their first egg-shaped concrete vat, Eggoist team got their inspiration from the Golden Ratio. It’s a proportion initially defined in geometry that corresponds to the Greek letter « φ ». It is considered particularly aesthetically pleasing. An Italian monk brought it fame during the Renaissance in a mathe- matics manual and coined it the divine proportion. The Golden Ratio has been frequently used for centuries by figures of the likes of Pythagoras, Leonardo da Vinci.