In 1921, Anton Baumstark delivered two lectures on the development of the Roman Rite to a gathering at the Abbey of Maria Laach. Abbot Ildefons Herwegen offered

How great the differences between the Last Supper celebrated by Jesus and a pontifical High Mass at St. Peter's in Rome! And also, between the early baptisms by

Places the theological and spiritual elements of the liturgical world against the backdrop of its historical development.

Liturgy in the Apostolic era.

How has the Liturgy of the Roman rite developed and changed in history before and after the Council of Trent? What principles have determined the boundaries of