I sent Volker Lobner of Frankfurt, Deutschland the first 7 negatives: Here are two of his replies:
The first is about negative (7).
"Now I have it.
This was a hotel in the area of the Obersalzberg, Hotel called Zum Türken.
Bormann bought it and it was used as security Departement. RSD ReichsSicherheitsDienst.
Naturally from there the bunker-system started. Now it was sold at Sothebys.
Yours Volker"
"Dear Calvin,
I think they were made in Bavaria. Nürnberg? or Munich (München)
The staircase inside I think is Schloß Neuschwanstein, King Ludwig built it.
The ruins are Hitlers Berchtesgaden. Eagle nest.
Yours Volker"