The Exeter Ordinale is a huge ordinal issued by John de Grandisson, bishop of Exeter 1327-69], in 1337; it is edited on the basis of manuscripts that belonged to, and were annotated by, the bishop himself. The compilation marked an important point in medieval study of the liturgy, and the Legenda liturgical readings for saints' days] which it contains are regarded as one of the most important sources for the study of English medieval hagiography, particularly for saints of English origin.