Behold, from now on will all ages call me blessed. The Mighty One has done great things for me, and holy is his name. LK 1:48-49
The Assumption is the oldest feast day of Our Lady, but we don't know how it first came to be celebrated.
Its origin is lost in those days when Jerusalem was restored as a sacred city, at the time of the Roman Emperor Constantine (c. 285-337). For 200 years, every memory of Jesus was obliterated from the city, and the sites made holy by His life, death and Resurrection became pagan temples.
After the building of the Church of the Holy Sepulchre in 336, the sacred sites began to be restored and memories of the life of Our Lord began to be celebrated by the people of Jerusalem. One of the memories about his mother centered around the "Tomb of Mary," close to Mount Zion, where the early Christian community had lived.
On the hill itself was the "Place of Dormition," the spot of Mary's "falling asleep," where she had died. The "Tomb of Mary" was where she was buried.
At this time, the "Memory of Mary" was being celebrated. Later it was to become our feast of the Assumption.
For a time, the "Memory of Mary" was marked only in Palestine, but then it was extended by the emperor to all the churches of the East. In the seventh century, it began to be celebrated in Rome under the title of the "Falling Asleep" ("Dormitio") of the Mother of God.
Soon the name was changed to the "Assumption of Mary," since there was more to the feast than her dying. It also proclaimed that she had been taken up, body and soul, into heaven.
The Assumption completes God's work in her since it was not fitting that the flesh that had given life to God himself should ever undergo corruption. The Assumption is God's crowning of His work as Mary ends her earthly life and enters eternity. The feast turns our eyes in that direction, where we will follow when our earthly life is over.
The feast days of the Church are not just the commemoration of historical events; they do not look only to the past. They look to the present and to the future and give us an insight into our own relationship with God. The Assumption looks to eternity and gives us hope that we, too, will follow Our Lady when our life is ended.
In 1950, in the Apostolic Constitution Munificentissimus Deus, Pope Pius XII proclaimed the Assumption of Mary a dogma of the Catholic Church in these words: "The Immaculate Mother of God, the ever-virgin Mary, having completed the course of her earthly life, was assumed body and soul into heaven."
With that, an ancient belief became Catholic doctrine and the Assumption was declared a truth revealed by God.
Almighty ever-living God, who assumed the Immaculate Virgin Mary, the Mother of your Son, body and soul into heavenly glory, grant we pray, that, always attentive to the things that are above, we may merit to be sharers of her glory.
Pictured is the fresco behind the tabernacle altar in the Cathedral depicting the Assumption and the dome above with an interconnected "A" and "M" for "Ave Maria"