Reichstag Cupola
What I've been calling the "dome" is actually a cupola according to Wikipedia. Whatever it is that stands here today is a modern interpretation of a far different adornment atop the building. When Berlin was reunified and the Reichstag selected to be the seat of the German parliament, the building was almost completely gutted. About the only original parts are the outer walls. Even these are plastered over where Russian bullets and shrapnel scarred the walls.