The Assumption of the Blessed Virgin Mary is a Catholic doctrine and feast celebrating Mary's bodily ascent into heaven at the end of her earthly life. Rooted in early Christian tradition, the Assumption was officially defined as dogma by Pope Pius XII in 1950 through the apostolic constitution *Munificentissimus Deus*. 

According to Catholic belief, Mary, free from original sin, was assumed body and soul into heaven, reflecting her unique role as the mother of Jesus Christ and the purity of her life. Celebrated on August 15, the Assumption is both a Holy Day of Obligation and a reminder of the promise of eternal life for all faithful believers. The feast is observed with Masses, processions, and Marian prayers, underscoring Mary's spiritual closeness and intercession for the Church.