"The Greatness of Mary" is a famous religious treatise by the Italian Saint Alphonsus Maria de Liguri, which was published in the 18th century. In this book, the author examines the role and significance of the Blessed Virgin Mary in Christian theology and spirituality. He shares his great admiration and respect for the Mother of God, regarding her as the greatest of all creatures, the embodiment of love, mercy and protector of all people. "The Greatness of Mary" has become a classic work of Catholic dogmatics and mystical literature, which leaves indescribable feelings of grace and patronage of the Blessed Virgin on every turn of the page.