The study of medieval liturgy is well served by a fuller appreciation of the unique richness of individual manuscripts. One example, Vat. Lat. 7701, is a key piece of evidence for uncovering the reception of the Carolingian project to ‘correct’ liturgy in Chieti, Abruzzo. This manuscript is a ‘pontifical’, created for the personal use of a ninth-century bishop of Chieti. Within this book, he described and prescribed his own liturgical duties, those which made up his office as the Carolingians understood it. The peculiarities of the manuscript and some of its unique features are best understood by reference to this imperative. Alongside other products of the Carolingian scriptorium at Chieti, the manuscript reveals that even bishops at the southernmost tip of the Carolingian Empire saw themselves as fully engaged in an Empire-wide programme to amend liturgical practice, which did not aim for uniformity but led to significant creativity. This programme was associated with imperial authority, but led by bishops themselves. Local liturgical variation is undeniable in our manuscript, but the sharing of texts and communication with sees all across the Empire are equally visible components.