 The Codognesi sought inclusion in the jurisdiction of Piacenza in order to have a wider and freer market.Thus, by an act ratified on April 21, 1492, they became citizens of Piacenza.To demonstrate their gratitude, they altered their coat-of-arms to show the Roman she-wolf (the symbol of Piacenza), tied to a quince tree (the symbol of Codogno) with a gold chain.