In the sweltering heat of a Roman summer in the year 358, something miraculous is said to have occurred. A wealthy Roman patrician named John and his wife, having no children, prayed fervently to the Blessed Virgin Mary for guidance on how to dedicate their fortune to God's glory. On the night of August 4-5, the couple each received the same vision: Mary appeared and told them that she wished a church to be built in her honor on the spot where they would find snow the following morning.
When they brought this vision to Pope Liberius, he revealed that he too had received the same dream. The next morning, to the astonishment of all Rome, fresh snow blanketed the summit of the Esquiline Hill in the middle of August. The Pope traced the outline of the church in the miraculous snow, and construction began immediately.
"Mary said, 'My soul magnifies the Lord. My spirit has rejoiced in God my Savior," — Luke 1:46-47
While the legend of the snow is beloved, historians trace the basilica's formal origins to the pontificate of Pope Sixtus III, who dedicated the church around 432 AD, shortly after the Council of Ephesus in 431. That ecumenical council had solemnly affirmed Mary's title as Theotokos — the Mother of God — against the heresy of Nestorius, who sought to diminish Mary's role in salvation history.
Sixtus III intended the basilica to be a monumental proclamation of this doctrine in stone and mosaic. It stands as the oldest church in the Western world dedicated to the Blessed Virgin Mary, a living testament to the Church's ancient and unwavering devotion to the Mother of God.
The basilica's interior is breathtaking in its antiquity and beauty. The fifth-century mosaics along the nave are among the oldest in any Roman church, depicting scenes from the Old Testament that prefigure Christ and His Mother. The triumphal arch mosaics portray the Annunciation, the Adoration of the Magi, and other scenes from the infancy narratives.
Beneath the high altar lies the Confessio, which houses relics traditionally believed to be pieces of the manger from Bethlehem — the very crib in which the infant Jesus was laid. For this reason, the basilica is also known as "Saint Mary of the Crib" (Santa Maria ad Praesepem).
Throughout the centuries, the basilica has been known by many names, each reflecting a facet of Marian devotion:
It is one of the four major papal basilicas of Rome and holds the distinction of being the only one to retain its early Christian structure substantially intact.
Every year on August 5, the miracle of the snow is commemorated with a shower of white rose petals released from the ceiling of the basilica during the liturgy. This beautiful tradition draws pilgrims and faithful from around the world, transforming the ancient church into a scene of wonder and devotion.
The icon of the Blessed Virgin known as Salus Populi Romani — "Salvation of the Roman People" — is venerated in a side chapel. Tradition attributes this icon to Saint Luke the Evangelist. Popes throughout history have prayed before this image, including Pope Francis, who visits it before and after every international journey.
"for he has looked at the humble state of his servant. For behold, from now on, all generations will call me blessed. For he who is mighty has done great things for me. Holy is his name." — Luke 1:48-49
The Dedication of the Basilica of Saint Mary Major invites us to reflect on the enduring place of the Blessed Virgin in the life of the Church. Just as the miraculous snow marked a specific place for God's glory, Mary herself was set apart from all eternity to bear the Word made flesh. The basilica stands as a reminder that devotion to Mary is not an innovation but a practice rooted in the earliest centuries of Christianity, affirmed by councils, celebrated in art, and cherished by the faithful across two millennia.