Munificentissimus Deus

Munificentissimus Deus Latin for 'The most bountiful God' Apostolic constitution of Pope Pius XII
Signature date	1 November 1950
Subject	Ex cathedra definition of the Assumption of the Blessed Virgin Mary as a dogma
Text	In Latin In English
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Munificentissimus Deus (Latin: The most bountiful God) is an apostolic constitution published in 1950 by Pope Pius XII. It defines ex cathedra the dogma of the Assumption of the Blessed Virgin Mary. It was the first ex-cathedra infallible statement since the official ruling on papal infallibility was made at the First Vatican Council (1869–1870). In 1854 Pope Pius IX made an infallible statement with Ineffabilis Deus on the Immaculate Conception of the Virgin Mary, which was a basis for this dogma.^[1]