Agnes of Poitiers was a 6th-century French saint who served as the abbess of the Holy Cross convent in Poitiers. Raised within the royal court, she became the spiritual daughter of Queen Radegund, the founder of the monastery. Known for her intelligence and holiness, she helped implement the Rule of St. Caesarius at the convent. Her leadership and connection to the community made her a significant figure in the religious life of the Frankish kingdom during this period.