I. History

The German term Liturgik (“liturgics”) was first used by the 16th-century Catholic mediation theologian G. Cassander; in the 19th century, Catholics began to use it for the historical, critical, systematic, and practical theory of Christian worship. The Oxford English Dictionary traces the use of liturgics in this sense to the mid-19th century. The term Liturgiewissenschaft (“liturgical studies”) was introduced by C.A. Baumstark in 1919 and R. Guardini…