Title: Hierarchia veritatum
Subjects: Catholic Church, Christian union, Relations, Vatican Council. (1962-1965.  : 2d) Decretum de oecumenismo, Vatican Council (2nd : 1962-1965 : Basilica di San Pietro in Vaticano). Decretum de oecumenismo, Vatican Council (2nd : 1962-1965). Decretum de oecumenismo, Vatican Council (2nd : 1962 : Basilica di San Pietro in Vaticano). Decretum de oecumenismo