An Historical Summary of Angelic Hierarchies from Part VII: The “Seven” Thrones in In Operibus Sigillo Dei Aemeth by David Richard Jones.
“Thrones and the divine order appear again in Dante’s unfinished Convivio or Banquet, a work reflecting his interest in ancient philosophy and modeled on the symposia of the ancient Greeks. Here we find a particular reflection of what we find in Dee and in the Spirit Actions of Liber Secundus.” [via]