Dadon (Ouen in French) belonged to one of the noblest families in the kingdom. A friend of Saint Eloi, Dagobert entrusted him with keeping his seal. Fighting against paganism in his diocese, Ouen played a decisive role in the council of Chalon-sur-Saône, where, under the influence of Irish spirituality, he introduced a canon advocating the imposition of private penance by bishops, during the confession. When Éloi died in 659, he decided to write the Life of his friend. After a trip to Rome where he met Pope Adéodat II, Ouen contributed, on his return, to the restoration of peace in the kingdom. He left his name to the town of Saint-Ouen.
If the Polish canon (member of the clergy) Copernic began studying art, medicine and studied economics, he was passionate about astronomy, which he studied at the University of Bologna. Back in Poland, he remains a canon but devotes himself in parallel to this science. He discovers that, contrary to