According to the "Chronicle of Parthénope", the Neapolitan princes whom Louis had imprisoned during his first campaign in Southern Italy proposed him to marry Queen Joanna I's younger sister and heir, Mary. She was the widow of Charles of Durazzo, who had been executed on Louis's orders. During the siege of Aversa in the summer of 1350, Louis met her envoy in the nearby Trentola-Ducenta and the terms of their marriage were accepted. However, Mary was forced to marry Robet of Baux after Louis left Southern Italy.