Documents

Liturgical Book
Martyrologium Romanum (1928)

editio secunda post typicam

by Sacred Congregation of Rites (1928)

 liturgy   saints 

Encyclical
Mortalium animos

Promoting true religious unity

by Pope Pius XI (1928.01.06)

 ecumenism 

Encyclical
Miserentissimus Redemptor

On reparation to the Sacred Heart

by Pope Pius XI (1928.05.08)

 Sacred Heart 

Encyclical
Rerum orientalium

On the reunion with the Eastern Churches

by Pope Pius XI (1928.09.08)

 Eastern Churches