Can architecture be copyrighted

Answer 1

Yes but as with most legal questions, with qualifications.

Prior to the Architectural Works Copyright Protection Act of 1990, signed into law by then President Bush, only the original architectural designs & drawings were protected by copyright. No protection was afforded to the physical building itself. This was changed when the new law provided for copyright protection to be extended to "design embodied in the drawings or building as architectural work."

Note that this does not give someone carte blanche on any/all buildings constructed prior to 1990 there are still trademark protections that may apply as well as trespass laws protection private property.

Answer 2

Yes.