My house would look more like the one on the right than the left one. 😏
It's just the stairs though.

In public buildings, it was there for everybody

An interesting video about traditionalism (Evola, Guenon) on my channel: t.me/buddhawarrechts

Athen an der Spree: https://youtu.be/iGg0cIQAfbc

Ancient Rome - 3d reconstruction
https://youtu.be/6rWDtJwKqGc
https://youtu.be/kveAOZfDA44
https://youtu.be/oZojOlM0KO4

What kind of public buildings? Give an example.

Great analogy!

All the older public buildings, where I live that was normal back then, and I live in the country

'All' sounds nice but I want to get one particular example. 'In the town A there's a public library B' or something like that.

In Vienna there are everywhere, even old residential housing has the same style, some is damaged but still there, the City council here where I live a d the next 2 villages, the Old part of the school here and in the next village

City council isn't really a place where simple people used to be in the old times, these were the places where higher-status people were dwelling and working. That school might have been a private school in the past. Don't forget that this places being public and accessible to all the public now doesn't mean it was that way when they were built.

No the schools were "Volksschulen" for the Volk and the City stuff and hosing were always accessible to the public

If what you're saying is true then I can only envy the people of Austria where this all was and is apparently 'für Volk'. Where I was born(Ukraine) and where I live now(Russia) this wasn't the case.

City halls, museums, libraries etc. Actually, wherever such grand staircases were built, the building was always to some extent available to the public (e.g. a royal palace where a ball was held)

Actually, the metro of Moscow is famous for its grand stations with elegant staircases

Moscow metro isn't old, it was built in the 20Th century.

Art is not about arguing and complaining about who is eligible to possess or have access to something. In fact, it often makes sense to restrict access to a work of high value. You can‘t open up everything to everybody - even if you sincerely wish so - unless you somehow make sure that everybody is able to recognize the high value of art and is cultivated enough to surpress the inner envy of not possessing a particular work of high value. It is hard to establish the right balance between providing access and restricting it. If you happen to be in Potsdam and Berlin feel free to visit what is left of the Prussian heritage - palaces, gardens, museums, villas, etc.