The Assumption celebrates the Virgin Mary being taken body and soul into heavenly glory at the end of her earthly life.
The Solemnity of the Assumption, celebrated on August 15th, proclaims that the Virgin Mary, at the end of her earthly life, was taken up body and soul into heavenly glory. This is one of the four Marian dogmas and a holy day of obligation in the universal Church.
On November 1, 1950, Pope Pius XII solemnly defined this doctrine in the apostolic constitution Munificentissimus Deus:
"We pronounce, declare, and define it to be a divinely revealed dogma: that the Immaculate Mother of God, the ever Virgin Mary, having completed the course of her earthly life, was assumed body and soul into heavenly glory."
The Pope noted that this belief had been held by the faithful "from ancient times" and was "based on Sacred Scripture" and "deeply embedded in the minds of the faithful."
While the Assumption is not explicitly described in Scripture, the Church finds it prefigured and implied:
The Ark of the Covenant (Revelation 11:19-12:1):
"Then God's temple in heaven was opened, and the ark of his covenant was seen within his temple... And a great sign appeared in heaven: a woman clothed with the sun."
Mary is the new Ark of the Covenant who bore the presence of God.
Psalm 132:8:
"Arise, O Lord, into your resting place, you and the ark of your sanctification."
The "Full of Grace" (Luke 1:28): Mary's fullness of grace implies freedom from the corruption of death.
The Assumption flows from other Marian doctrines:
Eastern Christians celebrate the "Dormition" (falling asleep) of the Virgin Mary. This tradition holds that Mary died a natural death before being assumed. The Western Church has not defined whether Mary died before her Assumption.
From the earliest centuries, no relics of Mary's body were ever claimed—unlike other saints. The tomb of Mary in Jerusalem was venerated as empty. The feast has been celebrated since at least the 6th century.
The Assumption is the patronal feast of many countries, including France (whose kings dedicated the nation to Mary under this title in 1638) and numerous dioceses, parishes, and religious communities worldwide.
The Assumption is a sign of hope for all Christians. What God has done for Mary, he will do for all the faithful at the resurrection. She is "the image and first flowering of the Church as she is to be perfected in the world to come" (Lumen Gentium, 68).