As Queen, Claude was eclipsed at court by her mother-in-law, Louise of Savoy, and her sister-in-law, the literary Navarrese queen Margaret of Angoulême. She never ruled over Brittany; in 1515 she gave the government of her domains to her husband in perpetuity. Unlike her younger sister Renée, she seems to have never showed any interest in her maternal inheritance nor had any disposition to politics, as she preferred to devote herself to religion under the influence, according to some sources, of Christopher Numar of Forli, who was the confessor of her mother-in-law. Gabriel Miron repeated his functions under Anne of Brittany and remained as Chancellor of Queen Claude and first doctor; he wrote a book entitled "de Regimine infantium tractatus tres".