Catherine of Siena was a 14th-century Italian mystic and theologian, born in 1347 in Siena, Italy. She is best known for her deep spiritual writings and her role in the Catholic Church, advocating for reform and unity during a time of political turmoil. Catherine experienced visions and had a strong commitment to her faith, which led her to become a prominent figure in the church. In 1970, she was declared a Doctor of the Church, recognizing her significant contributions to Christian theology. Catherine is also the patron saint of Italy and Europe, and her feast day is celebrated on April 29. Her legacy continues to inspire many in their spiritual journeys.