Amalar of Metz's On the Liturgy (the Liber officialis , or De ecclesiastico officio ) was one of the most widely read and circulated texts of the Carolingian era. The fruit of lifelong reflection and study in the wake of liturgical reform in the early ninth century, Amalar's commentary inaugurated the Western medieval tradition of allegorical liturgical exegesis and has bequeathed a wealth of information about the contents and conduct of the early...