Дом книги (Dom Knigi) is just around the corner from the US Embassy in Moscow, where I spent seven months back in 2000. Some sort of PR stunt took place there in the last couple days that I don't really understand, but it has led to the store being mentioned numerous times in various Russian photo sites I follow.
The reason I think it is significant is that Dom Knigi was the first place I ever handled a sales transaction completely by myself in Russia. It was even operating in the Soviet style at the time, where you wait in one line to tell them what you want, another to pay for it, and a third to pick it up. All that for a couple ink pen refills.