Orientalium Ecclesiarum is the
Decree on the Catholic Churches of the Eastern Rite from the Second
Vatican Council[?]. One of the shorter such documents, it was passed by the bishops assembled by a vote of 2,110 to 39 and promulgated by
Pope Paul VI on
November 21,
1964. The name means "Eastern Churches" in
Latin, and is taken from the first line of the decree, as is customary with
Roman Catholic official documents. The English text is available on the Vatican web site at:
http://www.vatican.va/archive/hist_councils/ii_vatican_council/documents/vat-ii_decree_19641121_orientalium-ecclesiarum_en.html