@40hz: Thanks for the references/links. I hadn't read that.
As for that building, well it is a just a huge artefact - a church - built to worship what turned out to be a short-lived religio-political ideology. Just another religion, and there are so many of them, and we keep making up new ones - e.g., including Moonies, Scientology, Apple, Green, Global Warming™ (aka Climate Change™) - not to mention Swedenborgianism, Spiritualism, all the newly-invented US "Christian"-based sects and the Islamic sectarian branches, the EU, and the USA.
So many prayers to say, sins to confess, and tithes to pay to placate all of their gods ... so little time...