An abbey is a monastery or religious community of the highest class, governed by an abbot, assisted generally by a prior, sub-prior, and other subordinate functionaries; or, in the case of a female community, superintended by an abbess. An abbey invariably included a church. A priory differed from an abbey only in being scarcely so extensive an establishment, and was governed by a prior. In the English conventual cathedral establishments, as Canterbury, Norwich, Ely, etc, the archbishops or bishops held the abbot's place, the immediate governor of the monastery being called a prior.
Some priories sprang originally from the more important abbeys, and remained under the jurisdiction of the abbots; but subsequently any real distinction between abbeys and priories was lost. The greater abbeys formed most complete and extensive establishments, including not only the church and other buildings devoted to the monastic life and its daily requirements, such as the refectory or eating-room, the dormitories or sleeping-rooms, the room for social intercourse, the school for novices, the scribes' cells, library, and so on; but also workshops, storehouses, mills, cattle and poultry sheds, dwellings for artisans, labourers, and other servants, infirmary, guest-house, etc. Among the most famous abbeys on the continent of Europe were those of Cluny, Clairvaux, and Citeaux in France; St. Galle in Switzerland, and Pulda in Germany; the most noteworthy English abbeys were those of Westminster, St Mary's of York, Fountains, Kirkstall, Tintern, Rievaulx, Netley; and of Scotland, Melrose, Paisley, and Arbroath. Research Abbey