Today we visited the Reichstag dome. To do this you have to book on line, a day or two in advance and bring ID with you. Nevertheless, the additional time to do this was well worth it. The dome is fantastic. It was designed by an English Architect to sit above the Reichstag. After the re-unification of Germany, the decision was made to re-build the Reichstag to represent a new, unified Germany.
In fact, we've been thinking about our last trip to Berlin in 1994. There have been so many changes in the city since then. For instance, when we last visited, the Brandenburger Tor was largely on it's own, with ex GRD soldiers selling whatever they could lay their hands on. Now the area's been re-built, mostly with embassies (we did notice that the Swiss embassy was in a completely different part of town to the others).
A lot of Berlin is like that, as is Dresden.
We've felt that about a lot of the things we've seen in Berlin. Many of the museums and monuments (particularly relating to WWII and the GDR years) are brand new. Most have only opened in the last few years.
These things are all very important, but as our guide Rob said, those 60 years, while quite horrible, are just a very small part of German history. Pretty much every field of knowledge (such as Physics and Einstein, Music and Bach, and so forth) has a German playing a key role in it, such as Frederick the Great.