He was able to analyse lucidly and condemn the errors of Modernism. His great devotion to the Virgin and love for the Eucharist nourished his holiness. He supported the Cecilian Movement, which wanted to give back the deserved space in the liturgy to Gregorian chant
The first Hungarian king was a pivotal player in the Christianization of the Magyar country. He encouraged the establishment of Christianity with various laws and availed himself of the help of the Cluniac monks for the evangelization of the country.
On 1 November 1950, Pius XII solemnly defined the dogma of the Assumption of Mary: “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”