Complex sentence: Pope Pius XII dedicated the newly-built Seminary on December 8,1952, the annual Solemnity of the Immaculate Conception, and the Casa Santa Maria was re-opened as a residence for ordained United States Catholic priests pursuing advanced studies in Rome.
Split into simpler sentences: Pope Pius XII dedicated the newly-built Seminary on December 8,1952, the annual Solemnity of the Immaculate Conception. The Casa Santa Maria was re-opened as a residence for ordained United States Catholic priests pursuing advanced studies in Rome.