There is a museum of technology in Berlin. It's incredibly large! I agreed to go because I thought K would really enjoy it, and I had nothing against seeing old trains, airplanes, and so on. To my surprise, there was a lot of sewing related stuff as well! Here are a few photos from the day.
That's not all my photos, of course, but those are the sewing highlights of the technical museum. If anyone is ever in Berlin, I would recommend it. (Caveat: the signs are mostly in German only.)