To appreciate the scale of the Church of the East, we can look at a list of the church’s metropolitans—that is, of those senior clergy who oversaw inferior hierarchies of bishops grouped in provinces. In England, to give a comparison, the medieval church had two metropolitans: respectively, at York and Canterbury. Timothy himself presided over nineteen metropolitans and eighty-five bishops. Though the exact locations of metropolitan seats changed over time, map 1.1 on identifies some of the leading centers.