Catholic Mariology is the systematic study of the person of Mary, the mother of Jesus, and of her place in the Economy of Salvation in Catholic theology. According to the doctrine of the Immaculate Conception taught by the Catholic Church, Mary was conceived and born without the stain of original sin from the sin of Adam and Eve, meaning she was saved by God in the moment of her conception, and she is also known as the "New Eve", hence she is seen as having a singular dignity above the saints, receiving a higher level of veneration than all angelic spirits and blessed souls in heaven. Catholic Mariology thus studies not only her life but also the veneration of her in daily life, prayer, hymns, art, music, and architecture in modern and ancient Christianity throughout the ages.Our Lady (Madonna) is also defined as Mater Populi Fidelis in the "Doctrinal Note on Some Marian Titles Regarding Mary’s Cooperation in the Work of Salvation" of Pope Leo PP.XIV of 7 October 2025.
The basis of Mariology are the four Marian dogmas (also known as the Theotokos, Θεοτόκος in Greek): Mary's Divine Motherhood (or being the Mother of God), Her Immaculate Conception (having no stain of original sin), Her Perpetual Virginity, and the Assumption of Mary into Heaven. However, a number of other Catholic doctrines about the Virgin Mary have been developed by reference to Sacred Scripture, theological reasoning and church tradition. The development of Mariology is ongoing and since the beginnings it has continued to be shaped by theological analyses, writings of saints, and papal statements, e.g. while all four of the dogmas are ancient in their origin, two were not defined until the 19th and 20th centuries; and papal teachings on Mary have continued to appear in recent times.