The "cube of physics" is a quite useful summary of physics, for historical$^1$ and teaching$^2$ purposes, that is best explained (as far as I know) in "Physics On A Cube" by Jeremy Côté or in "The cube of physical theories" by Sabine Hossenfelder
$^1$ it recaps all biggest turning points in the history of physics
$^2$ for example, it is in the intro of Zee's Einstein Gravity in a Nutshell
The idea has been attributed to Matvei Bronstein on wiki:
He introduced the cGh scheme for classifying physical theories. "After the relativistic quantum theory is created, the task will be to develop the next part of our scheme, that is to unify quantum theory (with its constant h), special relativity (with constant c), and the theory of gravitation (with its G) into a single theory."(2)
But the citation note references a paper I could find nowhere:
(2) Bronstein, M. P. "K voprosu o vozmozhnoy teorii mira kak tselogo" ("On the Question of a Possible Theory of the World as a Whole"), in Uspekhiastronomitcheskihnauk. Sbornik, No. 3 (Moscow: ONTI, 1933) p. 3–30, as quoted and translated in Gorelik (2005) loc. cit.
Even the one who wrote the long article I mentioned at the beginning couldn't find anything:
I could not locate the original article by Bronstein. As is the case with a lot of old papers, they have citations from other resources, but there is no copy to be found. It took enough work to find Bronstein’s first name...