Conference entitled "An example of the expansion catalane au Maghreb: l'attaque de Ceuta par les Roussillonnais et Majorquins en 1234" by Professor Pierre-Vincent Claverie. Designated by Calcurini through the annals of the Genoese Bartolomeo Scriba, the identification of these attackers has been the subject of debate for five centuries. Using linguistic and historical criteria, the author proposes a Catalan origin for this group, which would maintain fruitful solidarity with the Republic of Genoa. This would explain the chivalrous behavior they had adopted when they met a squadron in Liguria in August 1234.