We visited the Pergamon Museum, Museum Island, and it was well worth the 10 euro entry. The audio guide is great (included in the entry fee) as you choose what you want to hear about. We followed the rules - no large bags (including handbags) or coats draped over arms and left our stuff in a locker, so it was awkward carrying small items like purses or phones - particularly when lots of people didn't bother and weren't pulled up for it! The exhibits were great, especially the Ishtar gate - if you like archaeological exhibitions, this is for you.
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