Instruct: Classify a review as either positive or negative.
Query: Important Milestone

An interesting read from both a doctrinal as well as historical perspective. Issued in 1947, the encyclical focuses on the preservation and nature of the liturgy - including the mass, the hours, devotionals and sacraments. Interestingly, many of the examples used by Pius XII in the encyclical, such as going to a "primative" original eucharistic celebration, the return to the "table" style altar, elimination of Gregorian chant, the use of the vernacular and similar items were, within 20 years, adopted by the Church as part of the Vatican II reforms. The encyclical discusses the symbolism of the liturgy at length as well as parctice and customs. A good historical milestone that presages the Vatical II reforms.