Catherine of Siena (March 25, 1347-April 29, 1380) was a mystic, activist, and author who had a great influence on Italian literature and the Catholic Church.
Catherine's mystical theology was employed towards practical ends for her own spiritual life and those of others. She used the language of medieval scholastic philosophy in the Dialogue, a poetic and prophetic work. Advocating for continuous, humble prayer, she hears God the Father answering her requests in order to receive help to be saved.
Catherine gives special importance to mental prayer, but also recommends vocal prayer. Writing about God's truth and love, she considers charity to be the greatest virtue.