Below is a paste from the museum's website. We are confused--are the exhibits OTHER than the alter open, or only the Panorama? We will be visiting in mid May.
Significant artefacts from Pergamon along with the monumental panorama by Yadegar Asisi are on display in the exhibition building Pergamonmuseum. Das Panorama, located in the direct vicinity of the Museumsinsel. The Pergamonmuseum is completely closed to the public due to construction work.