The chapters concerning Lavinium have in the book I of the Roman Antiquities a central part, because of their length and of their place. Dionysius finds his materials in the historical works of his Greek and Roman predecessors, but also in his personal experience, as he lived in Rome, and visited Lavinium. The chapters about Lavinium contain elements of three traditions : a local one, about the Trojan origins of Lavinium ; the tradition of the filiation between Rome and Lavinium through Alba ; lastly, the tradition according to which the Trojan people is a Greek one, and Rome a Greek city.Les chapitres concernant Lavinium jouent dans le livre I des Antiquités Romaines un rôle central, par leur longueur et par leur place. Denys tire sa matiè...