The Archdiocese of St Andrews (originally the Diocese of St Andrews) was a territorial episcopal jurisdiction of the Catholic Church in early modern and medieval Scotland. It was the largest, most populous and wealthiest diocese of the medieval Scottish Catholic church, with territory in eastern Scotland stretching from Berwickshire and the Anglo-Scottish border to Aberdeenshire. Although not an archdiocese until 1472, St Andrews was recognised as the chief see of the Scottish church from at least the 11th century. It came to be one of two archdioceses of the Scottish church, from the early 16th century having the bishoprics of Aberdeen, Brechin, Caithness, Dunblane, Dunkeld, Moray, Orkney and Ross as suffragans. Origins One Pictish king-list credits Óengus II, King of the Picts (died 834), as the founder of the monastery-church at St Andrews, but an obituary of a St Andrews' abbot is recorded in the Annals of Ulster for the year 747, around seven decades before this king ruled. The obituary of Túathalán, the abbot in question, constitutes the earliest literary evidence for St Andrews. It is possible that the church was founded during the reign of Óengus I, who had been ruling during this time. Historian Jame Fraser points out that in England both Canterbury and York were dedicated to St Peter, with their junior bishoprics dedicated to St Andrew, that is, the churches of Hexham and Rochester. It is possible thus that St Andrews was established as a bishopric from the outset, junior to the bishopric of Rosemarkie, which appears originally to have been dedicated to St Peter. It is also possible that the emergence of the cult of St Andrew in the 8th century was connected with the appearance of "Constantine" as a royal name in the era, St Andrew being the patron of Constantinople. Bishops of the Scots The diocese's head, the Bishop of St Andrews, came to be regarded as the chief cleric of the kingdom of Scotland, ahead of the Bishop of Glasgow (2nd), the Bishop of Dunkeld (3rd) and the Bishop of Aberdeen (4th). The Augustinian account of the foundation of St Andrews, written between 1140 and 1153, notes and comments on a book-cover (cumdach) and the titles of the bishops:...[F]rom ancient times they have been called bishops of St Andrew, and in both ancient and modern writings they are found called "High Archbishops" or "High Bishops of the Scots". Which is why