And what about this? It depicts the nine celestial hierarchies.
Of the nine orders of heavenly hosts, only the angels, archangels, seraphim and cherubim are given any sort of biblical description of their appearance, or have been revealed in a form visible to human eyes. There seems to be nothing revealed in Tradition which allows us to make an image of thrones, dominions, principalities, powers or virtues.
The iconographer here has simply depicted these "unknown" ranks in the same way as angels and archangels. His depiction of seraphim, cherubim, angels and archangels is quite in order. Schlock? Not really. Just an honest, if not entirely correct, attempt.