How interesting would it be if certain buildings on colonies or even on Earth were constructed in Revivalist architecture instead of the usual space-age/futuristic architecture? The reasons for the existence of these buildings being the result of human nostalgia. These sort of buildings are mostly found on older Colonies. Revivalist as in buildings that use visual styles that consciously echo or mimic the style of a previous architectural era in Earth's history. Not completely abandoning older "primitive" or "ancient styles" but utilizing them for their aesthetics and beauty that the older styles had. Like a way of showing that Humanity, although evolved, has not entirely forgotten about it's past. Revivalist architecture still being used by a space age society and not by some pre-warp society..
The colony where Doctor Beverly Crusher's grandmother lived pretty much did this, looking to all extents and purposes like a village in Scotland https://memory-alpha.fandom.com/wiki/Caldos_colony
And (the capital of) Deneva was apparently built by people who liked their 1950s American futurism a lot. https://memory-alpha.fandom.com/wiki/Deneva Timo Saloniemi