The correct answer is that the iron support structure was visible
When you build something, the structural points such as pillars are usually not easily discernible to the untrained eye because they fit right there with the remaining walls and things like plaster or bricks. However, his Palace was built out of Glass so the iron supporting structures could easily be seen and it looked great.
For decades prior to the Prohibition (i.e., the legal ban of alcoholic drinks) made possible by the Eighteen Amendment, different Christian churches and organizations had been objecting to the consumption of alcohol since they considered it as the source of most debauchery and moral decadence. Their goal was made clear to the federal government: alcohol should be completely banned in order to clean society up. An excise tax on alcohol would have been rejected by all the moralistic groups advocating for prohibition as a mild and ineffective measure
Like most modern believers in free markets, Smith believed that the government should enforce contracts and grant patents and copyrights to encourage inventions and new ideas. ... Smith's writings are both an inquiry into the science of economics and a policy guide for realizing the wealth of nations.