[nubero]

You made a good catch with the spacing of the columns! I actually wrote about it in the article in the 7th footnote. But that is where it had to remain because – as I assume you know from how you write – it’s a rabbit hole. We could go further and mention that behind the inner columns is actually the cella (inner chamber), which would make for a darker backdrop of these columns than the outermost columns, which would be set against the blue sky, would have. That too makes for a difference in perception and is a further reason, why the outermost columns are set more closely to their cella-backed neighbour columns… And so on, and so on… :-)