There’s plenty to chose from on “museum island”, but we went for the Pergamon because they offered some good sounding guided tours. We went for the “take five” highlights tour, and it was well worth the price of 15 euros, since this also included general admission. The guide was exceptionally knowledgeable and erudite in his explanations, and in fact it was all quite academic and pitched at a high level – much appreciated. The group size was not too large – so easy to be involved and ask questions; it’s advisable to book on-line in advance, however. You’ll be taken through a substantial period of ancient history via the processional way of ancient Babylon and the market gate of Miletus, an ancient Greek and Roman city on the western coast of Anatolia. Of course there is some controversy about structures such as the Ishtar Gate, a passageway into the inner city of Babylon, being brought to Berlin and reconstructed in a museum – our guide was happy to field questions on this tricky subject and offer a justification, based on accessibility and preservation, which you may or may not be happy to accept!