This is a Hochbunker in Bremen, with a 1.4 meter thick concrete roof. There was room for approximately 200 people. There were electrical lights and separate toilets/washing facilities for men and women. There were hand cranked air pumping machines to bring in oxygen. The were many very small rooms to prevent people gathering in large groups, to help reduce hysteria.
This one is covered in street art. It is also in the middle of a construction site, not damaged so far, but it remains to be seen if it will be retained.
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