Olga Klein
Google
The building is worth to visit, but visiting part is not so easy. The website never works where you "can buy' a ticket. And only agencies offer you skip the line ticket. In fact, there is no line to skip. The tip from us: we managed to call at the morning, and even in nice English we were attended. The reservation was made for the same day. And when you come , it is from the right side, along the parking you go upstairs, and in the middle of the building there us an entrance with a small plate saying for visitors. If not the previous evening walk there , when we took the picture of small information at the gate ( that information is at the left side) nothing will happen. I post the picture with the number of the phone. So overall when you are there, it is simple. You need to have a valid original ID, and you pay there (could be by card). The tour was in English, with nice guide, very interesting historical facts and interesting room tours.