On the 5th day of August, which is that time when the heat of summer waxeth greatest in Rome, a part of the Esquiline Hill was covered by night with snow. And on this same night the Mother of God appeared in a dream to John and his wife separately, and told them that on that spot, which in the morning they should see clad with snow, they should build a Church, to be dedicated in the name of the Virgin Mary, for that this was the way in which she chose that they should make her their heiress. John went and told it to Pope Liberius, who declared that he also had been visited by a like dream.
Therefore he came in a solemn procession of Priests and people to the snow-clad hill, and traced upon that spot the plan of a Church which was built with the money of John and his wife. It was afterwards rebuilt by Sixtus III. At the beginning it was called by divers names, sometimes the Liberian Basilica, sometimes the Church of St Mary-at-the-Manger. Howbeit, since there are in Rome many Churches called after the Holy Virgin Mary, and this Church doth excel them all, both in honour, and because of the strange sign wherewith it was dedicated, it hath come to be called the Church of St Mary, the Greater. The memory of the dedication thereof is kept every year by a Feast-day that taketh name from the wonderful fall of snow which on this day took place."
-Matins, Second Nocturn, Feast of Our Lady of Snows
What a beautiful title for Our Lady. Ever since I entered the Church, I have had a great affinity for this title. Also, thinking about snow in the heat of August is a very consoling thought!!!