When I visited Bonn a couple of years ago, I was particularly impressed by the Haus der Geschichte (Home of history) museum.
It was incredibly new at the time (or at least seemed so) and was very well put together. Designed for a mainly German audience, it concentrated very much on domestic matters and history, but was a brilliant insight from an outsiders point of view.
I was little disappointed at the time that there was no much support for non-German speakers within the museum, but having been to British museums too, we are more guilty of being foreigner-unfriendly I think.
The holocaust section is very chilling. Original metal shelving with row upon row of little cards recording Jews etc. The furnace illustration was truly moving too. A small dark room in which there was the consant roar of the furnances of a concentration camp.
The modern part of the museum concentrated quite heavily on post-war politics and includes a setup of the then parliament.
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