I am sure I am not using the right word but here’s what I mean.
I saw in the United Arab Emirates they built a replica of the Taj Mahal in India, it looks like a really good copy. And I know copies of other “Things” and “Building” are elsewhere but is there anything not legal about building the exact same building. Are not the blueprints “copyrighted” or “trademarked” or whatever the proper term is?
You could copyright a particular design. However, most famous buildings like the Taj Mahal were created before 1923 and that puts them into the public domain so anyone can copy them.
Also – and I have only the tiniest understanding of intellectual property laws – I believe that it might be possible to trademark some aspects of a building , if there is an ongoing business that uses the aspect to identify itself. The aspect would have to be distinct enough that it serves to identify your particular brand (say, golden arches, a blue dome in the shape of a soft-serve ice cream, or even a particular shade of paint if distinct enough).