The Achilles Heel of Cultural Hegemony
Potters Guild
The secret of the shell probably came from Spain after the Moors were defeated and influenced the Renaissance. The Medici family likely received this secret as a reward for supporting the Potters Guild, which had close ties to sculptors, as Humanism was revived.
The catenary curve on pottery chard (2650 BC) was excavated in or near 1925 in Djoser's Pyramid in Saqqara, Egypt.