The Church of the East, more commonly referred to as the Septarchy or Septism, was a branch of the popular Church of the Heavens. It originated in the early Era of Harvest after Aden, who in Septism was referred to as the prophet of Heaven, sent down by the Archangels to guide the wayward souls of Esria home. Although it did not start as such, it grew to become centric to East Astria, and took on the distinct culture of that region. Although it largely served the same purposes as its western counterpart, Septism deviated from the Adenist belief in one single book, and in the canonisation of the prophet Aden, who was known as Vadym.