St. Catherine of Siena was born during the outbreak of the plague in Siena, Italy on 25 March 1347. Catherine herself was a twin, but her sister did not survive infancy. Her mother was 40 when she was born. Her father was a cloth dyer.
At the age of 16, Catherine’s sister, Bonaventura, died, leaving her husband as a widower. Catherine’s parents proposed that he marry Catherine as a replacement, but Catherine opposed this. She began fasting and cut her hair short to mar her appearance.
Catherine once explained that she regarded her father as a representation of Jesus and her mother as Our Lady, and her brothers as the apostles, which helped her to serve them with humility.
Despite Catherine’s religious nature, she did not choose to enter a convent and instead she joined the Third Order of St. Dominic, which allowed her to associate with a religious society while living at home.
She lived quietly, isolated within her family home.
St. Catherine developed a habit of giving things away and she continually gave away her family’s food and clothing to people in need. She never asked permission to give these things away, and she quietly put up with their criticisms.
She has many mystical experiences during that time.
She often visited hospitals and homes where the poor and sick were found. Her activities quickly attracted followers who helped her in her mission to serve the poor and sick.
From 1375 onwards, St. Catherine began dictating letters to scribes. She petitioned for peace and was instrumental in persuading the Pope in Avignon to return to Rome.
She became involved in the fractured politics of her time but was instrumental in restoring the Papacy to Rome and in brokering peace deals during a time of factional conflict and war between the Italian city-states.
She also established a monastery for women in 1377 outside of Siena. She is credited with composing over 400 letters, her Dialogue, which is her definitive work, and her prayers. These works are so influential that St. Catherine would later be declared a Doctor of the Church. She is one of the most influential and popular saints in the Church.
By 1380, the 33-year-old mystic had become ill, possibly because of her habit of extreme fasting. Her confessor, Raymond, ordered her to eat, but she replied that she found it difficult to do so, and that possibly she was ill.
She died on April 29, following a stroke just a week prior.