The Assumption is the oldest feast day of Our Lady, but its origin is lost in those days when Jerusalem was restored as a sacred city, at the time of the Roman Emperor Constantine (285-337). By then it had been a pagan city for two centuries, ever since Emperor Hadrian (76-138) had leveled it around the year 135 and rebuilt it as Aelia Capitolina in honour of Jupiter.

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.

At this time, the "Memory of Mary" was being celebrated. Later it was to become our feast of the Assumption. 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.

That belief was ancient, dating back to the apostles themselves. What was clear from the beginning was that there were no relics of Mary to be venerated, and that an empty tomb stood on the edge of Jerusalem near the site of her death. That location also soon became a place of pilgrimage. (Today, the Benedictine Abbey of the Dormition of Mary stands on the spot.)

In the eighth century, St. John Damascene was known for giving sermons at the holy places in Jerusalem. At the Tomb of Mary, he expressed the belief of the Church on the meaning of the feast: "Although the body was duly buried, it did not remain in the state of death, neither was it dissolved by decay. . . . You were transferred to your heavenly home."

All the feast days of Mary mark the great mysteries of her life and her part in the work of redemption. The central mystery of her life and person is her divine motherhood, celebrated both at Christmas and a week later (Jan. 1) on the feast of the Solemnity of Mary, Mother of God. The Immaculate Conception (Dec. 8) marks the preparation for that motherhood, so that she had the fullness of grace from the first moment of her existence, completely untouched by sin.

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.