Catherine of Siena
1347 — 1380 · Feast day: April 29
A lay Dominican mystic, political counselor, and Doctor of the Church, Catherine of Siena persuaded Pope Gregory XI to return the papacy to Rome from Avignon after nearly seventy years in France. She dictated her theological masterpiece 'The Dialogue of Divine Providence' and left nearly 400 letters to popes, rulers, and ordinary sinners alike.