 The production level was such that required an “Editto del Potestà” (Edict) to prohibit that the huge quantities of waste and processing residues were thrown in the adjacent Pesa River, so to avoid its stream to be diverted.In the mid-15th century, Montelupo was an important part of the circulation of techniques and knowledge that characterized that period of history.Artists trained in Montelupo Fiorentino went to work in the cities of Faenza and Cafaggiolo, among others.