Yes, it's interesting to (boring old) me to think that the architectural-numerical dimension started also (along with so much else) with Mandelstam. He wrote several poems about buildings, and Omry Ronen (Approach to Mandelstam) outlined some of the complex internal architecture in two of his longer odes. This is what got me started down that path. It's such a big part of traditional writing, but 20th-cent. & contemporary poets don't seem to go there much.

In writing various long poems over the last 15 years I've found that the numerical calculations & structuring are very helpful, they become part of the thinking/planning process, they mesh with the subject-matter in various ways... I find these "rhymes", which serve to synthesize my own private experience with other things...

Music - architecture - poetry. Keeps the wrangling litter-world at bay.