In Naour, as you can see from the previous post, the apse ceiling is a very peculiar shape, not a proper half dome but a rather flattened 'eye' shape. This isn't particularly inspiring, but we must work with what we have.
Having decided upon Christ in a round mandorla, in this context it leaves the two spaces at the corners to attend to. Given the shapes and that this is a sanctuary, where we enter into the adoration of the the angels and archangels and the whole company of heaven, my mind set upon the Seraphim who often appear in this context, not least on the 'fans' present during Orthodox worship.
However, I thought I ought to look a little closer at the theological description of these spiritual beings...and didn't realise just how appropriate they are for this icon of the Sacred Heart. Here I quote from Wikipedia:
I was quite balled over to be honest at just how intimate these beings are to the Sacred Heart. From this theological understanding we can legitimately go on to describe the Seraphim as attendants to the Divine Furnace of the Sacred Heart, fanning its flames into an intense heat and dispersing it to the very furthest limits of the cosmos. Just as the nature of angels is to proclaim, so the nature of the Seraphim are to disperse the Divine Fire or Light. I could write a whole treatise on this...but enough I think here to indicate that the exploration this icon is demanding is opening up more and more depths to this Mystery.