The "Libellus" of the Carolingian monk Walahfrid presents a first history of Christian liturgy, but also considers aspects of hymnography and church architecture. The introduction and commentary discuss his source texts, their transmission and availability in the mid-ninth century.

Alice Harting-Corrêa, Ph.D. (1991) St. Andrews has worked in Princeton, NJ and Germany and is currently working in St. Andrews, Scotland.