Our Lady of the Snows
During the pontificate of Pope Liberius, the Roman patrician John and his wife, who were without heirs, made a vow to donate their possessions to the Virgin Mary. They prayed that she might make known to them how they were to dispose of their property in her honor. On August 5th, at the height of the Roman summer, snow fell during the night on the summit of the Esquiline Hill. In obedience to a vision of the Virgin Mary that they had the same night, the couple built a basilica in honor of Mary on the very spot that was covered with snow.
Today it is called the Basilica of Santa Maria Maggiore, the largest church in Rome dedicated to Mary.