Saint Catherine of Siena is depicted holding a crucifix and a quill, symbolizing her deep devotion to Christ and her influential theological writings. As a Dominican nun and mystic, Catherine played a pivotal role in guiding the Church through her letters and spiritual insights. Her life was marked by intense prayer, fasting, and a mystical relationship with God. She is honored as a Doctor of the Church and is known for her unwavering faith and service to others. This design captures her legacy as a beacon of wisdom, humility, and divine inspiration.