There are only two infallible dogma in the history of the Catholic Church proclaimed by the Catholic Church. The first is the Immaculate Conception, proclaimed on December 8, 1854 by Pius IX. The second infallible dogma is the Assumption. On November 1, 1950, Pius XII declared the dogma of the Virgin being assumed, Body and Soul, into heavenly glory.
Both infallible dogma are about Mary. This is fascinating. But why?