Each exhibit is in an enclosed room. So you go from one exhibit, in an enclosed room, to the next you will nef to walk through doors and the exhibits are on a few levels. From street level, to basement, and back up to street level. They are all great exhibits/art work. I highly recommend a visit.
No. They have at least two floors
No, there is another floor accessible by stairs only, as far as I know. It contains exhibits.
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