Saint Catherine of Siena, T.O.S.D, (25 March 1347 – 29 April 1380) was a tertiary of the Dominican Order, and a Scholastic philosopher and theologian. She also worked to bring the Papacy back to Rome from its displacement in France, and to establish peace among the Italian city-states. She was proclaimed a Doctor of the Church in 1970. She is one of the two patron saints of Italy, together with Francis of Assisi.