Pseudo-Dionysius: the nine choirs
the Celestial Hierarchy, about the 5th or 6th century
Three orders of three.
- Seraphim, cherubim and thrones are the first order, dominions, virtues and powers the second, principalities, archangels and angels the third.
- The tool uses this order.
Sources: Pseudo-Dionysius, The Celestial Hierarchy