Pope Leo XIV unveiled his motto and coat of arms shortly after his election in May 2025, highlighting his deep connection to the Order of Saint Augustine. His motto, "In Illo uno unam," translates to "In the One, we are one," and is derived from a commentary by Saint Augustine on Psalm 127. The coat of arms is divided diagonally, featuring a white lily on a blue background in the upper portion and the emblem of the Order of Saint Augustine in the lower part. A heart pierced by an arrow, a symbol closely associated with Saint Augustine, is also included on the coat of arms. Saint Augustine, a key figure in early Christian theology, lived in the late 4th century and served as bishop of Hippo in North Africa for 34 years. He is often portrayed in art as a reflective scholar, acknowledging the limits of human knowledge. The Order of Saint Augustine was established in 1244 when several hermit communities in Tuscany, Italy, sought unification under a single religious order, as requested by Pope Innocent IV. The order's Rule emphasizes communal living, urging members to "call nothing your own" and to avoid the pursuit of worldly desires. In visual representations, Saint Augustine is frequently shown with a heart pierced by an arrow, symbolizing a passage from his Confessions where he describes how God's love pierced his heart. This image is also linked to a story from the Golden Legend, which depicts Augustine with a child holding a spoon at his feet, representing the humility required to grasp the mystery of the Trinity. Augustine’s intellectual legacy includes major works such as the Confessions, On the Trinity, and The City of God, a vast philosophical and theological treatise. Renaissance artists often portrayed him as a deep thinker, as seen in Sandro Botticelli’s 1480 fresco, where Augustine is shown pausing his writing in pursuit of clarity. The fresco also reflects the cosmological views of the time, with Earth at the center of the universe. Pope Leo XIV has served as a teacher and pastor, having lectured on canon law and early Christian theology at the seminary San Carlos y San Marcelo in Peru. He described his election as both a "cross and a blessing," acknowledging the significant responsibility he and the cardinals share in guiding the Church and the world. His choice of motto and coat of arms underscores his commitment to unity, humility, and the spiritual teachings of Saint Augustine.